diff --git a/app/src/main/java/com/huanchengfly/tieba/post/ui/page/editprofile/viewmodel/EditProfileViewModel.kt b/app/src/main/java/com/huanchengfly/tieba/post/ui/page/editprofile/viewmodel/EditProfileViewModel.kt
index fe418c60..9d96ee23 100644
--- a/app/src/main/java/com/huanchengfly/tieba/post/ui/page/editprofile/viewmodel/EditProfileViewModel.kt
+++ b/app/src/main/java/com/huanchengfly/tieba/post/ui/page/editprofile/viewmodel/EditProfileViewModel.kt
@@ -14,7 +14,7 @@ import com.huanchengfly.tieba.post.ui.page.editprofile.EditProfilePartialChange
 import com.huanchengfly.tieba.post.ui.page.editprofile.EditProfileState
 import com.huanchengfly.tieba.post.utils.AccountUtil
 import dagger.hilt.android.lifecycle.HiltViewModel
-import kotlinx.coroutines.FlowPreview
+import kotlinx.coroutines.ExperimentalCoroutinesApi
 import kotlinx.coroutines.flow.*
 import javax.inject.Inject
 
@@ -30,7 +30,7 @@ class EditProfileViewModel @Inject constructor() :
     class EditProfilePartialChangeProducer(
         private val tiebaApi: ITiebaApi
     ) : PartialChangeProducer<EditProfileIntent, EditProfilePartialChange, EditProfileState> {
-        @OptIn(FlowPreview::class)
+        @OptIn(ExperimentalCoroutinesApi::class)
         override fun toPartialChangeFlow(intentFlow: Flow<EditProfileIntent>): Flow<EditProfilePartialChange> =
             merge(
                 intentFlow.filterIsInstance<EditProfileIntent.Init>()
@@ -63,7 +63,7 @@ class EditProfileViewModel @Inject constructor() :
             tiebaApi.profileModifyFlow(birthdayShowStatus, "${birthdayTime / 1000L}", intro, "$sex")
                 .map {
                     if (it.errorCode == 0) EditProfilePartialChange.Submit.Success else EditProfilePartialChange.Submit.Fail(
-                        it.errorMsg ?: "unknown error"
+                        it.errorMsg
                     )
                 }
                 .onStart {
@@ -94,9 +94,9 @@ class EditProfileViewModel @Inject constructor() :
             tiebaApi.imgPortrait(file)
                 .map {
                     if (it.errorCode == 0 || it.errorCode == 300003)
-                        EditProfilePartialChange.UploadPortrait.Success(it.errorMsg ?: "success")
+                        EditProfilePartialChange.UploadPortrait.Success(it.errorMsg)
                     else
-                        EditProfilePartialChange.UploadPortrait.Fail(it.errorMsg ?: "")
+                        EditProfilePartialChange.UploadPortrait.Fail(it.errorMsg)
                 }
                 .onStart { EditProfilePartialChange.UploadPortrait.Uploading }
                 .catch {
diff --git a/app/src/main/java/com/huanchengfly/tieba/post/ui/page/forum/ForumViewModel.kt b/app/src/main/java/com/huanchengfly/tieba/post/ui/page/forum/ForumViewModel.kt
index 843dbfdb..c5847c5b 100644
--- a/app/src/main/java/com/huanchengfly/tieba/post/ui/page/forum/ForumViewModel.kt
+++ b/app/src/main/java/com/huanchengfly/tieba/post/ui/page/forum/ForumViewModel.kt
@@ -15,7 +15,7 @@ import com.huanchengfly.tieba.post.arch.UiIntent
 import com.huanchengfly.tieba.post.arch.UiState
 import com.huanchengfly.tieba.post.repository.FrsPageRepository
 import dagger.hilt.android.lifecycle.HiltViewModel
-import kotlinx.coroutines.FlowPreview
+import kotlinx.coroutines.ExperimentalCoroutinesApi
 import kotlinx.coroutines.flow.Flow
 import kotlinx.coroutines.flow.catch
 import kotlinx.coroutines.flow.filterIsInstance
@@ -64,7 +64,7 @@ class ForumViewModel @Inject constructor() :
 
     private object ForumPartialChangeProducer :
         PartialChangeProducer<ForumUiIntent, ForumPartialChange, ForumUiState> {
-        @OptIn(FlowPreview::class)
+        @OptIn(ExperimentalCoroutinesApi::class)
         override fun toPartialChangeFlow(intentFlow: Flow<ForumUiIntent>): Flow<ForumPartialChange> =
             merge(
                 intentFlow.filterIsInstance<ForumUiIntent.Load>()
diff --git a/app/src/main/java/com/huanchengfly/tieba/post/ui/page/forum/threadlist/ForumThreadListViewModel.kt b/app/src/main/java/com/huanchengfly/tieba/post/ui/page/forum/threadlist/ForumThreadListViewModel.kt
index 8a6bd787..e052993d 100644
--- a/app/src/main/java/com/huanchengfly/tieba/post/ui/page/forum/threadlist/ForumThreadListViewModel.kt
+++ b/app/src/main/java/com/huanchengfly/tieba/post/ui/page/forum/threadlist/ForumThreadListViewModel.kt
@@ -21,7 +21,7 @@ import com.huanchengfly.tieba.post.arch.wrapImmutable
 import com.huanchengfly.tieba.post.repository.FrsPageRepository
 import com.huanchengfly.tieba.post.utils.appPreferences
 import dagger.hilt.android.lifecycle.HiltViewModel
-import kotlinx.coroutines.FlowPreview
+import kotlinx.coroutines.ExperimentalCoroutinesApi
 import kotlinx.coroutines.flow.Flow
 import kotlinx.coroutines.flow.catch
 import kotlinx.coroutines.flow.filterIsInstance
@@ -75,7 +75,7 @@ class GoodThreadListViewModel @Inject constructor() : ForumThreadListViewModel()
 
 private class ForumThreadListPartialChangeProducer(val type: ForumThreadListType) :
     PartialChangeProducer<ForumThreadListUiIntent, ForumThreadListPartialChange, ForumThreadListUiState> {
-    @OptIn(FlowPreview::class)
+    @OptIn(ExperimentalCoroutinesApi::class)
     override fun toPartialChangeFlow(intentFlow: Flow<ForumThreadListUiIntent>): Flow<ForumThreadListPartialChange> =
         merge(
             intentFlow.filterIsInstance<ForumThreadListUiIntent.FirstLoad>()
diff --git a/app/src/main/java/com/huanchengfly/tieba/post/ui/page/history/list/HistoryListViewModel.kt b/app/src/main/java/com/huanchengfly/tieba/post/ui/page/history/list/HistoryListViewModel.kt
index d33042e8..e3fdd89c 100644
--- a/app/src/main/java/com/huanchengfly/tieba/post/ui/page/history/list/HistoryListViewModel.kt
+++ b/app/src/main/java/com/huanchengfly/tieba/post/ui/page/history/list/HistoryListViewModel.kt
@@ -13,7 +13,7 @@ import com.huanchengfly.tieba.post.utils.DateTimeUtils
 import com.huanchengfly.tieba.post.utils.HistoryUtil
 import dagger.hilt.android.lifecycle.HiltViewModel
 import kotlinx.coroutines.Dispatchers
-import kotlinx.coroutines.FlowPreview
+import kotlinx.coroutines.ExperimentalCoroutinesApi
 import kotlinx.coroutines.flow.Flow
 import kotlinx.coroutines.flow.catch
 import kotlinx.coroutines.flow.filterIsInstance
@@ -60,7 +60,7 @@ class ForumHistoryListViewModel @Inject constructor() : HistoryListViewModel() {
 
 private class HistoryListPartialChangeProducer(val type: Int) :
     PartialChangeProducer<HistoryListUiIntent, HistoryListPartialChange, HistoryListUiState> {
-    @OptIn(FlowPreview::class)
+    @OptIn(ExperimentalCoroutinesApi::class)
     override fun toPartialChangeFlow(intentFlow: Flow<HistoryListUiIntent>): Flow<HistoryListPartialChange> =
         merge(
             intentFlow.filterIsInstance<HistoryListUiIntent.Refresh>()
diff --git a/app/src/main/java/com/huanchengfly/tieba/post/ui/page/hottopic/list/HotTopicListViewModel.kt b/app/src/main/java/com/huanchengfly/tieba/post/ui/page/hottopic/list/HotTopicListViewModel.kt
index c44d8647..7e10f46b 100644
--- a/app/src/main/java/com/huanchengfly/tieba/post/ui/page/hottopic/list/HotTopicListViewModel.kt
+++ b/app/src/main/java/com/huanchengfly/tieba/post/ui/page/hottopic/list/HotTopicListViewModel.kt
@@ -11,7 +11,7 @@ import com.huanchengfly.tieba.post.arch.UiEvent
 import com.huanchengfly.tieba.post.arch.UiIntent
 import com.huanchengfly.tieba.post.arch.UiState
 import dagger.hilt.android.lifecycle.HiltViewModel
-import kotlinx.coroutines.FlowPreview
+import kotlinx.coroutines.ExperimentalCoroutinesApi
 import kotlinx.coroutines.flow.Flow
 import kotlinx.coroutines.flow.catch
 import kotlinx.coroutines.flow.filterIsInstance
@@ -32,7 +32,7 @@ class HotTopicListViewModel @Inject constructor() :
 
     private object HotTopicListPartialChangeProducer :
         PartialChangeProducer<HotTopicListUiIntent, HotTopicListPartialChange, HotTopicListUiState> {
-        @OptIn(FlowPreview::class)
+        @OptIn(ExperimentalCoroutinesApi::class)
         override fun toPartialChangeFlow(intentFlow: Flow<HotTopicListUiIntent>): Flow<HotTopicListPartialChange> =
             merge(
                 intentFlow.filterIsInstance<HotTopicListUiIntent.Load>()
diff --git a/app/src/main/java/com/huanchengfly/tieba/post/ui/page/main/explore/concern/ConcernViewModel.kt b/app/src/main/java/com/huanchengfly/tieba/post/ui/page/main/explore/concern/ConcernViewModel.kt
index d10102a3..6eb8ce04 100644
--- a/app/src/main/java/com/huanchengfly/tieba/post/ui/page/main/explore/concern/ConcernViewModel.kt
+++ b/app/src/main/java/com/huanchengfly/tieba/post/ui/page/main/explore/concern/ConcernViewModel.kt
@@ -17,7 +17,7 @@ import com.huanchengfly.tieba.post.arch.UiIntent
 import com.huanchengfly.tieba.post.arch.UiState
 import com.huanchengfly.tieba.post.utils.appPreferences
 import dagger.hilt.android.lifecycle.HiltViewModel
-import kotlinx.coroutines.FlowPreview
+import kotlinx.coroutines.ExperimentalCoroutinesApi
 import kotlinx.coroutines.flow.Flow
 import kotlinx.coroutines.flow.catch
 import kotlinx.coroutines.flow.filterIsInstance
@@ -44,7 +44,7 @@ class ConcernViewModel @Inject constructor() :
         }
 
     private object ExplorePartialChangeProducer : PartialChangeProducer<ConcernUiIntent, ConcernPartialChange, ConcernUiState> {
-        @OptIn(FlowPreview::class)
+        @OptIn(ExperimentalCoroutinesApi::class)
         override fun toPartialChangeFlow(intentFlow: Flow<ConcernUiIntent>): Flow<ConcernPartialChange> =
             merge(
                 intentFlow.filterIsInstance<ConcernUiIntent.Refresh>().flatMapConcat { produceRefreshPartialChange() },
diff --git a/app/src/main/java/com/huanchengfly/tieba/post/ui/page/main/explore/hot/HotViewModel.kt b/app/src/main/java/com/huanchengfly/tieba/post/ui/page/main/explore/hot/HotViewModel.kt
index 8b68347f..58f9a105 100644
--- a/app/src/main/java/com/huanchengfly/tieba/post/ui/page/main/explore/hot/HotViewModel.kt
+++ b/app/src/main/java/com/huanchengfly/tieba/post/ui/page/main/explore/hot/HotViewModel.kt
@@ -13,7 +13,7 @@ import com.huanchengfly.tieba.post.arch.UiEvent
 import com.huanchengfly.tieba.post.arch.UiIntent
 import com.huanchengfly.tieba.post.arch.UiState
 import dagger.hilt.android.lifecycle.HiltViewModel
-import kotlinx.coroutines.FlowPreview
+import kotlinx.coroutines.ExperimentalCoroutinesApi
 import kotlinx.coroutines.flow.Flow
 import kotlinx.coroutines.flow.catch
 import kotlinx.coroutines.flow.filterIsInstance
@@ -34,7 +34,7 @@ class HotViewModel @Inject constructor() :
 
     private object HotPartialChangeProducer :
         PartialChangeProducer<HotUiIntent, HotPartialChange, HotUiState> {
-        @OptIn(FlowPreview::class)
+        @OptIn(ExperimentalCoroutinesApi::class)
         override fun toPartialChangeFlow(intentFlow: Flow<HotUiIntent>): Flow<HotPartialChange> =
             merge(
                 intentFlow.filterIsInstance<HotUiIntent.Load>()
diff --git a/app/src/main/java/com/huanchengfly/tieba/post/ui/page/main/explore/personalized/PersonalizedViewModel.kt b/app/src/main/java/com/huanchengfly/tieba/post/ui/page/main/explore/personalized/PersonalizedViewModel.kt
index f699dc75..12c58ad9 100644
--- a/app/src/main/java/com/huanchengfly/tieba/post/ui/page/main/explore/personalized/PersonalizedViewModel.kt
+++ b/app/src/main/java/com/huanchengfly/tieba/post/ui/page/main/explore/personalized/PersonalizedViewModel.kt
@@ -22,7 +22,7 @@ import com.huanchengfly.tieba.post.arch.wrapImmutable
 import com.huanchengfly.tieba.post.models.DislikeBean
 import com.huanchengfly.tieba.post.utils.appPreferences
 import dagger.hilt.android.lifecycle.HiltViewModel
-import kotlinx.coroutines.FlowPreview
+import kotlinx.coroutines.ExperimentalCoroutinesApi
 import kotlinx.coroutines.flow.Flow
 import kotlinx.coroutines.flow.catch
 import kotlinx.coroutines.flow.filterIsInstance
@@ -54,7 +54,7 @@ class PersonalizedViewModel @Inject constructor() :
         }
 
     private object ExplorePartialChangeProducer : PartialChangeProducer<PersonalizedUiIntent, PersonalizedPartialChange, PersonalizedUiState> {
-        @OptIn(FlowPreview::class)
+        @OptIn(ExperimentalCoroutinesApi::class)
         override fun toPartialChangeFlow(intentFlow: Flow<PersonalizedUiIntent>): Flow<PersonalizedPartialChange> =
             merge(
                 intentFlow.filterIsInstance<PersonalizedUiIntent.Refresh>().flatMapConcat { produceRefreshPartialChange() },
diff --git a/app/src/main/java/com/huanchengfly/tieba/post/ui/page/main/home/HomeViewModel.kt b/app/src/main/java/com/huanchengfly/tieba/post/ui/page/main/home/HomeViewModel.kt
index 5fa8fe77..5a183cf6 100644
--- a/app/src/main/java/com/huanchengfly/tieba/post/ui/page/main/home/HomeViewModel.kt
+++ b/app/src/main/java/com/huanchengfly/tieba/post/ui/page/main/home/HomeViewModel.kt
@@ -8,7 +8,7 @@ import com.huanchengfly.tieba.post.arch.*
 import com.huanchengfly.tieba.post.models.database.TopForum
 import com.huanchengfly.tieba.post.utils.AccountUtil
 import kotlinx.coroutines.Dispatchers
-import kotlinx.coroutines.FlowPreview
+import kotlinx.coroutines.ExperimentalCoroutinesApi
 import kotlinx.coroutines.flow.*
 import org.litepal.LitePal
 
@@ -27,7 +27,7 @@ class HomeViewModel : BaseViewModel<HomeUiIntent, HomePartialChange, HomeUiState
 
     object HomePartialChangeProducer :
         PartialChangeProducer<HomeUiIntent, HomePartialChange, HomeUiState> {
-        @OptIn(FlowPreview::class)
+        @OptIn(ExperimentalCoroutinesApi::class)
         override fun toPartialChangeFlow(intentFlow: Flow<HomeUiIntent>): Flow<HomePartialChange> {
             return merge(
                 intentFlow.filterIsInstance<HomeUiIntent.Refresh>()
diff --git a/app/src/main/java/com/huanchengfly/tieba/post/ui/page/main/notifications/list/NotificationsListViewModel.kt b/app/src/main/java/com/huanchengfly/tieba/post/ui/page/main/notifications/list/NotificationsListViewModel.kt
index 414febce..352bcb1f 100644
--- a/app/src/main/java/com/huanchengfly/tieba/post/ui/page/main/notifications/list/NotificationsListViewModel.kt
+++ b/app/src/main/java/com/huanchengfly/tieba/post/ui/page/main/notifications/list/NotificationsListViewModel.kt
@@ -6,7 +6,7 @@ import com.huanchengfly.tieba.post.api.models.MessageListBean
 import com.huanchengfly.tieba.post.api.retrofit.exception.getErrorMessage
 import com.huanchengfly.tieba.post.arch.*
 import dagger.hilt.android.lifecycle.HiltViewModel
-import kotlinx.coroutines.FlowPreview
+import kotlinx.coroutines.ExperimentalCoroutinesApi
 import kotlinx.coroutines.flow.*
 import javax.inject.Inject
 
@@ -42,7 +42,7 @@ class AtMeListViewModel @Inject constructor() : NotificationsListViewModel() {
 }
 
 private class NotificationsListPartialChangeProducer(private val type: NotificationsType) : PartialChangeProducer<NotificationsListUiIntent, NotificationsListPartialChange, NotificationsListUiState> {
-    @OptIn(FlowPreview::class)
+    @OptIn(ExperimentalCoroutinesApi::class)
     override fun toPartialChangeFlow(intentFlow: Flow<NotificationsListUiIntent>): Flow<NotificationsListPartialChange> =
         merge(
             intentFlow.filterIsInstance<NotificationsListUiIntent.Refresh>().flatMapConcat { produceRefreshPartialChange() },
diff --git a/app/src/main/java/com/huanchengfly/tieba/post/ui/page/main/user/UserViewModel.kt b/app/src/main/java/com/huanchengfly/tieba/post/ui/page/main/user/UserViewModel.kt
index 5a8efd2c..43caaff7 100644
--- a/app/src/main/java/com/huanchengfly/tieba/post/ui/page/main/user/UserViewModel.kt
+++ b/app/src/main/java/com/huanchengfly/tieba/post/ui/page/main/user/UserViewModel.kt
@@ -8,7 +8,7 @@ import com.huanchengfly.tieba.post.arch.*
 import com.huanchengfly.tieba.post.models.database.Account
 import com.huanchengfly.tieba.post.utils.AccountUtil
 import dagger.hilt.android.lifecycle.HiltViewModel
-import kotlinx.coroutines.FlowPreview
+import kotlinx.coroutines.ExperimentalCoroutinesApi
 import kotlinx.coroutines.flow.*
 import javax.inject.Inject
 
@@ -28,7 +28,7 @@ class UserViewModel @Inject constructor() : BaseViewModel<UserUiIntent, UserPart
         }
 
     object UserPartialChangeProducer :PartialChangeProducer<UserUiIntent, UserPartialChange, UserUiState> {
-        @OptIn(FlowPreview::class)
+        @OptIn(ExperimentalCoroutinesApi::class)
         override fun toPartialChangeFlow(intentFlow: Flow<UserUiIntent>): Flow<UserPartialChange> =
             merge(
                 intentFlow.filterIsInstance<UserUiIntent.Refresh>().flatMapConcat { it.toPartialChangeFlow() }
diff --git a/app/src/main/java/com/huanchengfly/tieba/post/ui/page/photoview/PhotoViewViewModel.kt b/app/src/main/java/com/huanchengfly/tieba/post/ui/page/photoview/PhotoViewViewModel.kt
index 22aa823c..f1ccab3f 100644
--- a/app/src/main/java/com/huanchengfly/tieba/post/ui/page/photoview/PhotoViewViewModel.kt
+++ b/app/src/main/java/com/huanchengfly/tieba/post/ui/page/photoview/PhotoViewViewModel.kt
@@ -10,7 +10,7 @@ import com.huanchengfly.tieba.post.arch.UiIntent
 import com.huanchengfly.tieba.post.arch.UiState
 import com.huanchengfly.tieba.post.models.protos.LoadPicPageData
 import com.huanchengfly.tieba.post.models.protos.PhotoViewData
-import kotlinx.coroutines.FlowPreview
+import kotlinx.coroutines.ExperimentalCoroutinesApi
 import kotlinx.coroutines.flow.Flow
 import kotlinx.coroutines.flow.catch
 import kotlinx.coroutines.flow.filterIsInstance
@@ -27,7 +27,7 @@ class PhotoViewViewModel :
     override fun createPartialChangeProducer(): PartialChangeProducer<PhotoViewUiIntent, PhotoViewPartialChange, PhotoViewUiState> = PhotoViewPartialChangeProducer
 
     private object PhotoViewPartialChangeProducer : PartialChangeProducer<PhotoViewUiIntent, PhotoViewPartialChange, PhotoViewUiState> {
-        @OptIn(FlowPreview::class)
+        @OptIn(ExperimentalCoroutinesApi::class)
         override fun toPartialChangeFlow(intentFlow: Flow<PhotoViewUiIntent>): Flow<PhotoViewPartialChange> =
             merge(
                 intentFlow.filterIsInstance<PhotoViewUiIntent.Init>()
diff --git a/app/src/main/java/com/huanchengfly/tieba/post/ui/page/settings/block/BlockSettingsViewModel.kt b/app/src/main/java/com/huanchengfly/tieba/post/ui/page/settings/block/BlockSettingsViewModel.kt
index d23fa148..eb7313cc 100644
--- a/app/src/main/java/com/huanchengfly/tieba/post/ui/page/settings/block/BlockSettingsViewModel.kt
+++ b/app/src/main/java/com/huanchengfly/tieba/post/ui/page/settings/block/BlockSettingsViewModel.kt
@@ -5,7 +5,7 @@ import com.huanchengfly.tieba.post.arch.*
 import com.huanchengfly.tieba.post.models.database.Block
 import com.huanchengfly.tieba.post.toJson
 import com.huanchengfly.tieba.post.utils.BlockManager
-import kotlinx.coroutines.FlowPreview
+import kotlinx.coroutines.ExperimentalCoroutinesApi
 import kotlinx.coroutines.flow.*
 
 class BlockSettingsViewModel :
@@ -26,7 +26,7 @@ class BlockSettingsViewModel :
         }
 
     private object BlockSettingsPartialChangeProducer : PartialChangeProducer<BlockSettingsUiIntent, BlockSettingsPartialChange, BlockSettingsUiState> {
-        @OptIn(FlowPreview::class)
+        @OptIn(ExperimentalCoroutinesApi::class)
         override fun toPartialChangeFlow(intentFlow: Flow<BlockSettingsUiIntent>): Flow<BlockSettingsPartialChange> =
             merge(
                 intentFlow.filterIsInstance<BlockSettingsUiIntent.Load>().flatMapConcat { produceLoadPartialChange() },
diff --git a/app/src/main/java/com/huanchengfly/tieba/post/ui/page/threadstore/ThreadStoreViewModel.kt b/app/src/main/java/com/huanchengfly/tieba/post/ui/page/threadstore/ThreadStoreViewModel.kt
index b69e2283..3e12a57f 100644
--- a/app/src/main/java/com/huanchengfly/tieba/post/ui/page/threadstore/ThreadStoreViewModel.kt
+++ b/app/src/main/java/com/huanchengfly/tieba/post/ui/page/threadstore/ThreadStoreViewModel.kt
@@ -15,7 +15,7 @@ import com.huanchengfly.tieba.post.arch.UiIntent
 import com.huanchengfly.tieba.post.arch.UiState
 import com.huanchengfly.tieba.post.arch.wrapImmutable
 import dagger.hilt.android.lifecycle.HiltViewModel
-import kotlinx.coroutines.FlowPreview
+import kotlinx.coroutines.ExperimentalCoroutinesApi
 import kotlinx.coroutines.flow.Flow
 import kotlinx.coroutines.flow.catch
 import kotlinx.coroutines.flow.filterIsInstance
@@ -48,7 +48,7 @@ class ThreadStoreViewModel @Inject constructor() :
 
     private object ThreadStorePartialChangeProducer :
         PartialChangeProducer<ThreadStoreUiIntent, ThreadStorePartialChange, ThreadStoreUiState> {
-        @OptIn(FlowPreview::class)
+        @OptIn(ExperimentalCoroutinesApi::class)
         override fun toPartialChangeFlow(intentFlow: Flow<ThreadStoreUiIntent>): Flow<ThreadStorePartialChange> =
             merge(
                 intentFlow.filterIsInstance<ThreadStoreUiIntent.Refresh>()
diff --git a/app/src/main/java/com/huanchengfly/tieba/post/utils/OKSigner.kt b/app/src/main/java/com/huanchengfly/tieba/post/utils/OKSigner.kt
index 7dc37e8b..d456eee6 100644
--- a/app/src/main/java/com/huanchengfly/tieba/post/utils/OKSigner.kt
+++ b/app/src/main/java/com/huanchengfly/tieba/post/utils/OKSigner.kt
@@ -10,7 +10,7 @@ import com.huanchengfly.tieba.post.api.retrofit.exception.getErrorMessage
 import com.huanchengfly.tieba.post.models.SignDataBean
 import com.huanchengfly.tieba.post.models.database.Account
 import kotlinx.coroutines.Dispatchers
-import kotlinx.coroutines.FlowPreview
+import kotlinx.coroutines.ExperimentalCoroutinesApi
 import kotlinx.coroutines.delay
 import kotlinx.coroutines.flow.*
 import kotlinx.coroutines.withContext
@@ -109,7 +109,7 @@ class SingleAccountSigner(
         return this
     }
 
-    @OptIn(FlowPreview::class)
+    @OptIn(ExperimentalCoroutinesApi::class)
     override suspend fun start(): Boolean {
         var result = false
         signData.clear()