diff --git a/fe/src/components/Post/renderers/list/RendererList.vue b/fe/src/components/Post/renderers/list/RendererList.vue
index 332d58c6..fde8e6f1 100644
--- a/fe/src/components/Post/renderers/list/RendererList.vue
+++ b/fe/src/components/Post/renderers/list/RendererList.vue
@@ -10,23 +10,32 @@ import ThreadItem from './ThreadItem.vue';
 import { baseGetUser, baseRenderUsername } from '../common';
 import type { ApiPosts } from '@/api/index.d';
 import type { Reply, SubReply, Thread } from '@/api/post';
-import type { BaiduUserID } from '@/api/user';
 import { compareRouteIsNewQuery, setComponentCustomScrollBehaviour } from '@/router';
 import type { Modify } from '@/shared';
-import { convertRemToPixels, isElementNode } from '@/shared';
 import { initialTippy } from '@/shared/tippy';
-import { computed, nextTick, onMounted } from 'vue';
+import { computed, onMounted, provide } from 'vue';
 import type { RouterScrollBehavior } from 'vue-router';
 import * as _ from 'lodash-es';
 
 const props = defineProps<{ initialPosts: ApiPosts['response'] }>();
 const getUser = baseGetUser(props.initialPosts.users);
 const renderUsername = baseRenderUsername(getUser);
-const userRoute = (uid: BaiduUserID) => ({ name: 'user/uid', params: { uid } });
+const userProvision = { getUser, renderUsername };
+
+// export type UserProvision = typeof userProvision;
+// will trigger @typescript-eslint/no-unsafe-assignment when `inject<UserProvision>('userProvision')`
+export interface UserProvision {
+    getUser: ReturnType<typeof baseGetUser>,
+    renderUsername: ReturnType<typeof baseRenderUsername>
+}
+provide<UserProvision>('userProvision', userProvision);
+
+export type ThreadWithGroupedSubReplies<AdditionalSubReply = never> =
+    Thread & { replies: Array<Reply & { subReplies: Array<AdditionalSubReply | SubReply[]> }> };
 const posts = computed(() => {
-    const newPosts = _.cloneDeep(props.initialPosts) as Modify<ApiPosts['response'], { // https://github.com/microsoft/TypeScript/issues/33591
-        threads: Array<Thread & { replies: Array<Reply & { subReplies: Array<SubReply | SubReply[]> }> }>
-    }>;
+    // https://github.com/microsoft/TypeScript/issues/33591
+    const newPosts = _.cloneDeep(props.initialPosts) as
+        Modify<ApiPosts['response'], { threads: Array<ThreadWithGroupedSubReplies<SubReply>> }>;
     newPosts.threads = newPosts.threads.map(thread => {
         thread.replies = thread.replies.map(reply => {
             // eslint-disable-next-line unicorn/no-array-reduce
@@ -55,9 +64,7 @@ const posts = computed(() => {
         return thread;
     });
 
-    return newPosts as Modify<ApiPosts['response'], {
-        threads: Array<Thread & { replies: Array<Reply & { subReplies: SubReply[][] }> }>
-    }>;
+    return newPosts as Modify<ApiPosts['response'], { threads: ThreadWithGroupedSubReplies[] }>;
 });
 
 onMounted(initialTippy);
diff --git a/fe/src/components/Post/renderers/list/ReplyItem.vue b/fe/src/components/Post/renderers/list/ReplyItem.vue
index 875d7f46..3784960b 100644
--- a/fe/src/components/Post/renderers/list/ReplyItem.vue
+++ b/fe/src/components/Post/renderers/list/ReplyItem.vue
@@ -22,20 +22,21 @@
             </div>
         </div>
         <div :ref="el => el !== null && replyElements.push(el as HTMLElement)"
-                class="reply row shadow-sm bs-callout bs-callout-info">
+             class="reply row shadow-sm bs-callout bs-callout-info">
             <div v-for="author in [getUser(reply.authorUid)]" :key="author.uid"
                  class="reply-author col-auto text-center sticky-top shadow-sm badge bg-light">
-                <RouterLink :to="userRoute(author.uid)" class="d-block">
+                <RouterLink :to="toUserRoute(author.uid)" class="d-block">
                     <img :src="toUserPortraitImageUrl(author.portrait)" loading="lazy" class="tieba-user-portrait-large" />
                     <p class="my-0">{{ author.name }}</p>
                     <p v-if="author.displayName !== null && author.name !== null">{{ author.displayName }}</p>
                 </RouterLink>
-                <BadgeUser :user="getUser(reply.authorUid)" :threadAuthorUid="thread.authorUid" />
+                <BadgeUser :user="getUser(reply.authorUid)" :threadAuthorUid="threadAuthorUid" />
             </div>
             <div class="col me-2 px-1 border-start overflow-auto">
                 <div v-viewer.static class="reply-content p-2" v-html="reply.content" />
                 <template v-if="reply.subReplies.length > 0">
-                    <SubReplyGroup v-for="(subReplyGroup, _k) in reply.subReplies" :key="_k" :subReplyGroup="subReplyGroup" />
+                    <SubReplyGroup v-for="(subReplyGroup, _k) in reply.subReplies" :key="_k" :subReplyGroup="subReplyGroup"
+                                   :threadAuthorUid="threadAuthorUid" :replyAuthorUid="reply.authorUid" />
                 </template>
             </div>
         </div>
@@ -43,21 +44,30 @@
 </template>
 
 <script setup lang="ts">
+import type { ThreadWithGroupedSubReplies, UserProvision } from './RendererList.vue';
+import { guessReplyContainIntrinsicBlockSize } from './index';
 import SubReplyGroup from './SubReplyGroup.vue';
 import BadgePostTime from '@/components/Post/badges/BadgePostTime.vue';
 import BadgeUser from '@/components/Post/badges/BadgeUser.vue';
 import PostCommonMetadataIconLinks from '@/components/Post/badges/PostCommonMetadataIconLinks.vue';
-import type { Reply } from '@/api/post';
-import { toUserPortraitImageUrl } from '@/shared';
+import type { BaiduUserID } from '@/api/user';
+import { toUserPortraitImageUrl, toUserRoute } from '@/shared';
 import { useElementRefsStore } from '@/stores/elementRefs';
 import '@/styles/bootstrapCallout.css';
-import { ref } from 'vue';
+import { inject, nextTick, onMounted, ref } from 'vue';
 import { RouterLink } from 'vue-router';
 import { FontAwesomeIcon } from '@fortawesome/vue-fontawesome';
 
-defineProps<{ reply: Reply }>();
+defineProps<{ reply: ThreadWithGroupedSubReplies['replies'][number], threadAuthorUid: BaiduUserID }>();
 const elementRefsStore = useElementRefsStore();
+// eslint-disable-next-line @typescript-eslint/no-non-null-assertion
+const { getUser } = inject<UserProvision>('userProvision')!;
 const replyElements = ref<HTMLElement[]>([]);
+
+onMounted(async () => {
+    await nextTick();
+    guessReplyContainIntrinsicBlockSize(replyElements.value);
+});
 </script>
 
 <style scoped>
@@ -87,4 +97,4 @@ const replyElements = ref<HTMLElement[]>([]);
     font-size: 1rem;
     line-height: 150%;
 }
-</style>
\ No newline at end of file
+</style>
diff --git a/fe/src/components/Post/renderers/list/SubReplyGroup.vue b/fe/src/components/Post/renderers/list/SubReplyGroup.vue
index 5c8e98b7..fa576912 100644
--- a/fe/src/components/Post/renderers/list/SubReplyGroup.vue
+++ b/fe/src/components/Post/renderers/list/SubReplyGroup.vue
@@ -6,7 +6,7 @@
                 @mouseleave="() => { hoveringSubReplyID = 0 }"
                 class="sub-reply-item list-group-item">
                 <template v-for="author in [getUser(subReply.authorUid)]" :key="author.uid">
-                    <RouterLink v-if="subReplyGroup[subReplyIndex - 1] === undefined" :to="userRoute(author.uid)"
+                    <RouterLink v-if="subReplyGroup[subReplyIndex - 1] === undefined" :to="toUserRoute(author.uid)"
                                 class="sub-reply-author text-wrap badge bg-light">
                         <img :src="toUserPortraitImageUrl(author.portrait)"
                              loading="lazy" class="tieba-user-portrait-small" />
@@ -14,8 +14,8 @@
                             {{ renderUsername(subReply.authorUid) }}
                         </span>
                         <BadgeUser :user="getUser(subReply.authorUid)"
-                                   :threadAuthorUid="thread.authorUid"
-                                   :replyAuthorUid="reply.authorUid" />
+                                   :threadAuthorUid="threadAuthorUid"
+                                   :replyAuthorUid="replyAuthorUid" />
                     </RouterLink>
                     <div class="float-end badge bg-light">
                         <div class="d-inline" :class="{ invisible: hoveringSubReplyID !== subReply.spid }">
@@ -32,15 +32,19 @@
 </template>
 
 <script setup lang="ts">
+import type { UserProvision } from './RendererList.vue';
 import BadgePostTime from '@/components/Post/badges/BadgePostTime.vue';
 import BadgeUser from '@/components/Post/badges/BadgeUser.vue';
 import PostCommonMetadataIconLinks from '@/components/Post/badges/PostCommonMetadataIconLinks.vue';
 import type { SubReply } from '@/api/post';
-import { toUserPortraitImageUrl } from '@/shared';
-import { ref } from 'vue';
+import type { BaiduUserID } from '@/api/user';
+import { toUserPortraitImageUrl, toUserRoute } from '@/shared';
+import { inject, ref } from 'vue';
 import { RouterLink } from 'vue-router';
 
-defineProps<{ subReplyGroup: SubReply[] }>();
+defineProps<{ subReplyGroup: SubReply[], threadAuthorUid: BaiduUserID, replyAuthorUid: BaiduUserID }>();
+// eslint-disable-next-line @typescript-eslint/no-non-null-assertion
+const { getUser, renderUsername } = inject<UserProvision>('userProvision')!;
 const hoveringSubReplyID = ref(0);
 </script>
 
@@ -59,4 +63,4 @@ const hoveringSubReplyID = ref(0);
 .sub-reply-author {
     font-size: .9rem;
 }
-</style>
\ No newline at end of file
+</style>
diff --git a/fe/src/components/Post/renderers/list/ThreadItem.vue b/fe/src/components/Post/renderers/list/ThreadItem.vue
index 48df97f6..11e856a1 100644
--- a/fe/src/components/Post/renderers/list/ThreadItem.vue
+++ b/fe/src/components/Post/renderers/list/ThreadItem.vue
@@ -45,7 +45,7 @@
                     </span>
                 </div>
                 <div class="col-auto badge bg-light" role="group">
-                    <RouterLink :to="userRoute(thread.authorUid)">
+                    <RouterLink :to="toUserRoute(thread.authorUid)">
                         <span v-if="thread.latestReplierUid !== thread.authorUid"
                               class="fw-normal link-success">楼主：</span>
                         <span v-else class="fw-normal link-info">楼主兼最后回复：</span>
@@ -58,7 +58,7 @@
                         <span class="fw-bold link-dark">未知用户</span>
                     </template>
                     <template v-else-if="thread.latestReplierUid !== thread.authorUid">
-                        <RouterLink :to="userRoute(thread.latestReplierUid)" class="ms-2">
+                        <RouterLink :to="toUserRoute(thread.latestReplierUid)" class="ms-2">
                             <span class="fw-normal link-secondary">最后回复：</span>
                             <span class="fw-bold link-dark">{{ renderUsername(thread.latestReplierUid) }}</span>
                         </RouterLink>
@@ -67,24 +67,28 @@
                 </div>
             </div>
         </div>
-        <ReplyItem v-for="reply in thread.replies" :key="reply.pid" :reply="reply" />
+        <ReplyItem v-for="reply in thread.replies" :key="reply.pid" :reply="reply" :threadAuthorUid="thread.authorUid" />
     </div>
 </template>
 
 <script setup lang="ts">
+import type { ThreadWithGroupedSubReplies, UserProvision } from './RendererList.vue';
 import ReplyItem from './ReplyItem.vue';
 import BadgePostTime from '@/components/Post/badges/BadgePostTime.vue';
 import BadgeThread from '@/components/Post/badges/BadgeThread.vue';
 import BadgeUser from '@/components/Post/badges/BadgeUser.vue';
 import PostCommonMetadataIconLinks from '@/components/Post/badges/PostCommonMetadataIconLinks.vue';
-import type { Thread } from '@/api/post';
+import { toUserRoute } from '@/shared/index';
 import { useElementRefsStore } from '@/stores/elementRefs';
+import { inject } from 'vue';
 import { RouterLink } from 'vue-router';
 import { FontAwesomeIcon } from '@fortawesome/vue-fontawesome';
 import { DateTime } from 'luxon';
 
-defineProps<{ thread: Thread }>();
+defineProps<{ thread: ThreadWithGroupedSubReplies }>();
 const elementRefsStore = useElementRefsStore();
+// eslint-disable-next-line @typescript-eslint/no-non-null-assertion
+const { getUser, renderUsername } = inject<UserProvision>('userProvision')!;
 </script>
 
 <style scoped>
@@ -104,4 +108,4 @@ const elementRefsStore = useElementRefsStore();
     flex-basis: 100%;
     inline-size: 0;
 }
-</style>
\ No newline at end of file
+</style>
diff --git a/fe/src/shared/index.ts b/fe/src/shared/index.ts
index 801c128a..e09af62c 100644
--- a/fe/src/shared/index.ts
+++ b/fe/src/shared/index.ts
@@ -1,6 +1,7 @@
 import type { Cursor } from '@/api/index.d';
-import type { User } from '@/api/user';
+import type { BaiduUserID, User } from '@/api/user';
 import { computed } from 'vue';
+import type { LocationAsRelativeRaw } from 'vue-router';
 import Noty from 'noty';
 import * as _ from 'lodash-es';
 
@@ -51,6 +52,8 @@ export const toUserProfileUrl = (user: Partial<Pick<User, 'name' | 'portrait'>>)
         : `https://tieba.baidu.com/home/main?id=${user.portrait}`);
 export const toUserPortraitImageUrl = (portrait: string) =>
     `https://himg.bdimg.com/sys/portrait/item/${portrait}.jpg`; // use /sys/portraith for high-res image
+export const toUserRoute = (uid: BaiduUserID): LocationAsRelativeRaw =>
+    ({ name: 'user/uid', params: { uid: uid.toString() } });
 
 export const removeStart = (s: string, remove: string) => (s.startsWith(remove) ? s.slice(remove.length) : s);
 export const removeEnd = (s: string, remove: string) => (s.endsWith(remove) ? s.slice(0, -remove.length) : s);