diff --git a/app/src/main/java/com/huanchengfly/tieba/post/api/interfaces/ITiebaApi.kt b/app/src/main/java/com/huanchengfly/tieba/post/api/interfaces/ITiebaApi.kt
index 7f9f5c20..49740c36 100644
--- a/app/src/main/java/com/huanchengfly/tieba/post/api/interfaces/ITiebaApi.kt
+++ b/app/src/main/java/com/huanchengfly/tieba/post/api/interfaces/ITiebaApi.kt
@@ -1285,9 +1285,9 @@ interface ITiebaApi {
      * @param subPostId 楼中楼回复 ID
      */
     fun pbFloorFlow(
-        forumId: Long,
         threadId: Long,
         postId: Long,
+        forumId: Long = 0L,
         page: Int = 1,
         subPostId: Long = 0L
     ): Flow<PbFloorResponse>
diff --git a/app/src/main/java/com/huanchengfly/tieba/post/api/interfaces/impls/MixedTiebaApiImpl.kt b/app/src/main/java/com/huanchengfly/tieba/post/api/interfaces/impls/MixedTiebaApiImpl.kt
index 5e1e1fab..b41ca7bd 100644
--- a/app/src/main/java/com/huanchengfly/tieba/post/api/interfaces/impls/MixedTiebaApiImpl.kt
+++ b/app/src/main/java/com/huanchengfly/tieba/post/api/interfaces/impls/MixedTiebaApiImpl.kt
@@ -1110,9 +1110,9 @@ object MixedTiebaApiImpl : ITiebaApi {
     }
 
     override fun pbFloorFlow(
-        forumId: Long,
         threadId: Long,
         postId: Long,
+        forumId: Long,
         page: Int,
         subPostId: Long
     ): Flow<PbFloorResponse> {
diff --git a/app/src/main/java/com/huanchengfly/tieba/post/ui/page/subposts/SubPostsPage.kt b/app/src/main/java/com/huanchengfly/tieba/post/ui/page/subposts/SubPostsPage.kt
index faac5a42..c4b45c3c 100644
--- a/app/src/main/java/com/huanchengfly/tieba/post/ui/page/subposts/SubPostsPage.kt
+++ b/app/src/main/java/com/huanchengfly/tieba/post/ui/page/subposts/SubPostsPage.kt
@@ -63,10 +63,10 @@ import kotlinx.coroutines.delay
 @Composable
 fun SubPostsPage(
     navigator: DestinationsNavigator,
-    forumId: Long,
     threadId: Long,
-    postId: Long,
-    subPostsId: Long = 0L,
+    forumId: Long = 0L,
+    postId: Long = 0L,
+    subPostId: Long = 0L,
     loadFromSubPost: Boolean = false,
     viewModel: SubPostsViewModel = pageViewModel()
 ) {
@@ -76,7 +76,7 @@ fun SubPostsPage(
             forumId = forumId,
             threadId = threadId,
             postId = postId,
-            subPostsId = subPostsId,
+            subPostId = subPostId,
             loadFromSubPost = loadFromSubPost
         )
     }
@@ -88,10 +88,10 @@ fun SubPostsPage(
 @Composable
 fun SubPostsSheetPage(
     navigator: DestinationsNavigator,
-    forumId: Long,
     threadId: Long,
-    postId: Long,
-    subPostsId: Long = 0L,
+    forumId: Long = 0L,
+    postId: Long = 0L,
+    subPostId: Long = 0L,
     loadFromSubPost: Boolean = false,
     viewModel: SubPostsViewModel = pageViewModel()
 ) {
@@ -101,7 +101,7 @@ fun SubPostsSheetPage(
             forumId = forumId,
             threadId = threadId,
             postId = postId,
-            subPostsId = subPostsId,
+            subPostId = subPostId,
             loadFromSubPost = loadFromSubPost
         )
     }
@@ -114,7 +114,7 @@ internal fun SubPostsContent(
     forumId: Long,
     threadId: Long,
     postId: Long,
-    subPostsId: Long = 0L,
+    subPostId: Long = 0L,
     loadFromSubPost: Boolean = false,
 ) {
     val navigator = LocalNavigator.current
@@ -125,7 +125,9 @@ internal fun SubPostsContent(
                 forumId,
                 threadId,
                 postId,
-                subPostId = subPostsId.takeIf { loadFromSubPost } ?: 0L))
+                subPostId.takeIf { loadFromSubPost } ?: 0L
+            )
+        )
     }
 
     val isRefreshing by viewModel.uiState.collectPartialAsState(
@@ -164,12 +166,8 @@ internal fun SubPostsContent(
     val lazyListState = rememberLazyListState()
 
     viewModel.onEvent<SubPostsUiEvent.ScrollToSubPosts> {
-        if (!loadFromSubPost) {
-            delay(20)
-            lazyListState.scrollToItem(2 + subPosts.indexOfFirst { it.get { id } == subPostsId })
-        } else {
-            lazyListState.scrollToItem(1)
-        }
+        delay(20)
+        lazyListState.scrollToItem(2 + subPosts.indexOfFirst { it.get { id } == subPostId })
     }
 
     StateScreen(
@@ -206,8 +204,8 @@ internal fun SubPostsContent(
                             forumId,
                             threadId,
                             postId,
+                            subPostId,
                             currentPage + 1,
-                            subPostsId,
                         )
                     )
                 }
diff --git a/app/src/main/java/com/huanchengfly/tieba/post/ui/page/subposts/SubPostsViewModel.kt b/app/src/main/java/com/huanchengfly/tieba/post/ui/page/subposts/SubPostsViewModel.kt
index 745671f3..29c44155 100644
--- a/app/src/main/java/com/huanchengfly/tieba/post/ui/page/subposts/SubPostsViewModel.kt
+++ b/app/src/main/java/com/huanchengfly/tieba/post/ui/page/subposts/SubPostsViewModel.kt
@@ -61,7 +61,7 @@ class SubPostsViewModel @Inject constructor() :
 
         private fun SubPostsUiIntent.Load.producePartialChange(): Flow<SubPostsPartialChange.Load> =
             TiebaApi.getInstance()
-                .pbFloorFlow(forumId, threadId, postId, page, subPostId)
+                .pbFloorFlow(threadId, postId, forumId, page, subPostId)
                 .map<PbFloorResponse, SubPostsPartialChange.Load> { response ->
                     val post = checkNotNull(response.data_?.post)
                     val page = checkNotNull(response.data_?.page)
@@ -81,7 +81,7 @@ class SubPostsViewModel @Inject constructor() :
 
         private fun SubPostsUiIntent.LoadMore.producePartialChange(): Flow<SubPostsPartialChange.LoadMore> =
             TiebaApi.getInstance()
-                .pbFloorFlow(forumId, threadId, postId, page, subPostId)
+                .pbFloorFlow(threadId, postId, forumId, page, subPostId)
                 .map<PbFloorResponse, SubPostsPartialChange.LoadMore> { response ->
                     val post = checkNotNull(response.data_?.post)
                     val page = checkNotNull(response.data_?.page)
@@ -118,16 +118,16 @@ sealed interface SubPostsUiIntent : UiIntent {
         val forumId: Long,
         val threadId: Long,
         val postId: Long,
+        val subPostId: Long = 0L,
         val page: Int = 1,
-        val subPostId: Long = 0L
     ) : SubPostsUiIntent
 
     data class LoadMore(
         val forumId: Long,
         val threadId: Long,
         val postId: Long,
+        val subPostId: Long = 0L,
         val page: Int = 1,
-        val subPostId: Long = 0L
     ) : SubPostsUiIntent
 
     data class Agree(
diff --git a/app/src/main/java/com/huanchengfly/tieba/post/ui/page/thread/ThreadPage.kt b/app/src/main/java/com/huanchengfly/tieba/post/ui/page/thread/ThreadPage.kt
index 6a9c1949..4c6a613b 100644
--- a/app/src/main/java/com/huanchengfly/tieba/post/ui/page/thread/ThreadPage.kt
+++ b/app/src/main/java/com/huanchengfly/tieba/post/ui/page/thread/ThreadPage.kt
@@ -1026,7 +1026,7 @@ fun ThreadPage(
                                                             forumId = curForumId,
                                                             threadId = threadId,
                                                             postId = item.get { id },
-                                                            subPostsId = it,
+                                                            subPostId = it,
                                                             loadFromSubPost = false
                                                         )
                                                     )
diff --git a/app/src/main/protos/PbFloor/PbFloorRequestData.proto b/app/src/main/protos/PbFloor/PbFloorRequestData.proto
index 80ca711e..45af8c26 100644
--- a/app/src/main/protos/PbFloor/PbFloorRequestData.proto
+++ b/app/src/main/protos/PbFloor/PbFloorRequestData.proto
@@ -8,7 +8,7 @@ import "CommonRequest.proto";
 
 message PbFloorRequestData {
     int64 kz = 1;
-    int64 pid = 2;
+    optional int64 pid = 2;
     optional int64 spid = 3;
     int32 pn = 4;
     int32 scr_w = 5;