diff --git a/c#/GlobalSuppressions.cs b/c#/GlobalSuppressions.cs
index a7ae8735..bfd97d2f 100644
--- a/c#/GlobalSuppressions.cs
+++ b/c#/GlobalSuppressions.cs
@@ -88,3 +88,4 @@
 [assembly: SuppressMessage("StyleCop.CSharp.SpacingRules", "SA1009:Closing parenthesis should be spaced correctly")]
 [assembly: SuppressMessage("StyleCop.CSharp.SpacingRules", "SA1012:Opening braces should be spaced correctly")]
 [assembly: SuppressMessage("StyleCop.CSharp.SpacingRules", "SA1013:Closing braces should be spaced correctly")]
+[assembly: SuppressMessage("StyleCop.CSharp.SpacingRules", "SA1015:Closing generic brackets should be spaced correctly", Justification = "https://github.com/DotNetAnalyzers/StyleCopAnalyzers/issues/3856")]
diff --git a/c#/crawler/src/Db/Revision/Splitting/RevisionWithSplitting.cs b/c#/crawler/src/Db/Revision/Splitting/RevisionWithSplitting.cs
index 4bd00a2d..158553f4 100644
--- a/c#/crawler/src/Db/Revision/Splitting/RevisionWithSplitting.cs
+++ b/c#/crawler/src/Db/Revision/Splitting/RevisionWithSplitting.cs
@@ -32,8 +32,7 @@ public ModelBuilder HasBaseTable<TRevision>() where TRevision : TBaseRevision
         {
             var visitor = new ReplaceParameterTypeVisitor<TBaseRevision, TRevision>();
             _ = builder.Entity<TRevision>().ToTable(baseTableName)
-                .HasKey((Expression<Func<TRevision, object?>>)
-                    visitor.Visit(keySelector));
+                .HasKey((Expression<Func<TRevision, object?>>)visitor.Visit(keySelector));
             return this;
         }
 
@@ -44,8 +43,7 @@ public ModelBuilder SplitToTable<TRevisionWithSplitting>(string tableNameSuffix)
             _ = builder.Entity<TRevisionWithSplitting>()
                 .Ignore(e => e.NullFieldsBitMask)
                 .ToTable($"{baseTableName}_{tableNameSuffix}")
-                .HasKey((Expression<Func<TRevisionWithSplitting, object?>>)
-                    visitor.Visit(keySelector));
+                .HasKey((Expression<Func<TRevisionWithSplitting, object?>>)visitor.Visit(keySelector));
             return this;
         }
     }
diff --git a/c#/crawler/src/ReplaceParameterTypeVisitor.cs b/c#/crawler/src/ReplaceParameterTypeVisitor.cs
index 93fb11f9..e386f044 100644
--- a/c#/crawler/src/ReplaceParameterTypeVisitor.cs
+++ b/c#/crawler/src/ReplaceParameterTypeVisitor.cs
@@ -4,7 +4,9 @@
 namespace tbm.Crawler;
 
 /// <see>https://stackoverflow.com/questions/38316519/replace-parameter-type-in-lambda-expression/38345590#38345590</see>
+#pragma warning disable SA1618 // Generic type parameters should be documented
 public class ReplaceParameterTypeVisitor<TSource, TTarget> : ExpressionVisitor
+#pragma warning restore SA1618 // Generic type parameters should be documented
 {
     private ReadOnlyCollection<ParameterExpression>? _parameters;
 
diff --git a/c#/crawler/src/Tieba/Crawl/Saver/Post/ReplySaver.cs b/c#/crawler/src/Tieba/Crawl/Saver/Post/ReplySaver.cs
index 093c00ee..0e1e636d 100644
--- a/c#/crawler/src/Tieba/Crawl/Saver/Post/ReplySaver.cs
+++ b/c#/crawler/src/Tieba/Crawl/Saver/Post/ReplySaver.cs
@@ -9,9 +9,10 @@ public class ReplySaver(
     : PostSaver<ReplyPost, BaseReplyRevision, Pid>(
         logger, posts, authorRevisionSaverFactory, PostType.Reply)
 {
+    private Lazy<Dictionary<Type, AddSplitRevisionsDelegate>>? _addSplitRevisionsDelegatesKeyByEntityType;
+
     public delegate ReplySaver New(ConcurrentDictionary<PostId, ReplyPost> posts);
 
-    private Lazy<Dictionary<Type, AddSplitRevisionsDelegate>>? _addSplitRevisionsDelegatesKeyByEntityType;
     protected override Lazy<Dictionary<Type, AddSplitRevisionsDelegate>>
         AddSplitRevisionsDelegatesKeyByEntityType =>
         _addSplitRevisionsDelegatesKeyByEntityType ??= new(() => new()
@@ -21,17 +22,11 @@ protected override Lazy<Dictionary<Type, AddSplitRevisionsDelegate>>
             {typeof(ReplyRevision.SplitAgreeCount), AddSplitRevisions<ReplyRevision.SplitAgreeCount>}
         });
 
-    protected override Pid RevisionEntityIdSelector(BaseReplyRevision entity) => entity.Pid;
-    protected override Expression<Func<BaseReplyRevision, bool>>
-        IsRevisionEntityIdEqualsExpression(BaseReplyRevision newRevision) =>
-        existingRevision => existingRevision.Pid == newRevision.Pid;
-
     public override bool UserFieldUpdateIgnorance(string propName, object? oldValue, object? newValue) => propName switch
     { // FansNickname in reply response will always be null
         nameof(User.FansNickname) when newValue is null && oldValue is not null => true,
         _ => false
     };
-
     public override bool UserFieldRevisionIgnorance(string propName, object? oldValue, object? newValue) => propName switch
     { // user icon will be null after UserParser.ResetUsersIcon() get invoked
         nameof(User.Icon) when newValue is not null && oldValue is null => true,
@@ -51,6 +46,11 @@ public override SaverChangeSet<ReplyPost> Save(CrawlerDbContext db)
         return changeSet;
     }
 
+    protected override Pid RevisionEntityIdSelector(BaseReplyRevision entity) => entity.Pid;
+    protected override Expression<Func<BaseReplyRevision, bool>>
+        IsRevisionEntityIdEqualsExpression(BaseReplyRevision newRevision) =>
+        existingRevision => existingRevision.Pid == newRevision.Pid;
+
     protected override bool FieldUpdateIgnorance
         (string propName, object? oldValue, object? newValue) => propName switch
     { // possible randomly respond with null
diff --git a/c#/crawler/src/Tieba/Crawl/Saver/Post/SubReplySaver.cs b/c#/crawler/src/Tieba/Crawl/Saver/Post/SubReplySaver.cs
index 2a18dc08..ad237e9b 100644
--- a/c#/crawler/src/Tieba/Crawl/Saver/Post/SubReplySaver.cs
+++ b/c#/crawler/src/Tieba/Crawl/Saver/Post/SubReplySaver.cs
@@ -7,9 +7,10 @@ public class SubReplySaver(
     : PostSaver<SubReplyPost, BaseSubReplyRevision, Spid>(
         logger, posts, authorRevisionSaverFactory, PostType.SubReply)
 {
+    private Lazy<Dictionary<Type, AddSplitRevisionsDelegate>>? _addSplitRevisionsDelegatesKeyByEntityType;
+
     public delegate SubReplySaver New(ConcurrentDictionary<PostId, SubReplyPost> posts);
 
-    private Lazy<Dictionary<Type, AddSplitRevisionsDelegate>>? _addSplitRevisionsDelegatesKeyByEntityType;
     protected override Lazy<Dictionary<Type, AddSplitRevisionsDelegate>>
         AddSplitRevisionsDelegatesKeyByEntityType =>
         _addSplitRevisionsDelegatesKeyByEntityType ??= new(() => new()
@@ -18,11 +19,6 @@ protected override Lazy<Dictionary<Type, AddSplitRevisionsDelegate>>
             {typeof(SubReplyRevision.SplitDisagreeCount), AddSplitRevisions<SubReplyRevision.SplitDisagreeCount>},
         });
 
-    protected override Spid RevisionEntityIdSelector(BaseSubReplyRevision entity) => entity.Spid;
-    protected override Expression<Func<BaseSubReplyRevision, bool>>
-        IsRevisionEntityIdEqualsExpression(BaseSubReplyRevision newRevision) =>
-        existingRevision => existingRevision.Spid == newRevision.Spid;
-
     public override bool UserFieldUpdateIgnorance
         (string propName, object? oldValue, object? newValue) => propName switch
     { // always ignore updates on iconinfo due to some rare user will show some extra icons
@@ -47,5 +43,10 @@ public override SaverChangeSet<SubReplyPost> Save(CrawlerDbContext db)
         return changeSet;
     }
 
+    protected override Spid RevisionEntityIdSelector(BaseSubReplyRevision entity) => entity.Spid;
+    protected override Expression<Func<BaseSubReplyRevision, bool>>
+        IsRevisionEntityIdEqualsExpression(BaseSubReplyRevision newRevision) =>
+        existingRevision => existingRevision.Spid == newRevision.Spid;
+
     protected override NullFieldsBitMask GetRevisionNullFieldBitMask(string fieldName) => 0;
 }
diff --git a/c#/crawler/src/Tieba/Crawl/Saver/Post/ThreadSaver.cs b/c#/crawler/src/Tieba/Crawl/Saver/Post/ThreadSaver.cs
index e1e05e8e..c6773cb6 100644
--- a/c#/crawler/src/Tieba/Crawl/Saver/Post/ThreadSaver.cs
+++ b/c#/crawler/src/Tieba/Crawl/Saver/Post/ThreadSaver.cs
@@ -9,9 +9,10 @@ public class ThreadSaver(
     : PostSaver<ThreadPost, BaseThreadRevision, Tid>(
         logger, posts, authorRevisionSaverFactory, PostType.Thread)
 {
+    private Lazy<Dictionary<Type, AddSplitRevisionsDelegate>>? _addSplitRevisionsDelegatesKeyByEntityType;
+
     public delegate ThreadSaver New(ConcurrentDictionary<Tid, ThreadPost> posts);
 
-    private Lazy<Dictionary<Type, AddSplitRevisionsDelegate>>? _addSplitRevisionsDelegatesKeyByEntityType;
     protected override Lazy<Dictionary<Type, AddSplitRevisionsDelegate>>
         AddSplitRevisionsDelegatesKeyByEntityType =>
         _addSplitRevisionsDelegatesKeyByEntityType ??= new(() => new()
@@ -19,11 +20,6 @@ protected override Lazy<Dictionary<Type, AddSplitRevisionsDelegate>>
             {typeof(ThreadRevision.SplitViewCount), AddSplitRevisions<ThreadRevision.SplitViewCount>}
         });
 
-    protected override Tid RevisionEntityIdSelector(BaseThreadRevision entity) => entity.Tid;
-    protected override Expression<Func<BaseThreadRevision, bool>>
-        IsRevisionEntityIdEqualsExpression(BaseThreadRevision newRevision) =>
-        existingRevision => existingRevision.Tid == newRevision.Tid;
-
     public override bool UserFieldUpdateIgnorance
         (string propName, object? oldValue, object? newValue) => propName switch
     { // Icon.SpriteInfo will be an empty array and the icon url is a smaller one
@@ -39,6 +35,11 @@ public override SaverChangeSet<ThreadPost> Save(CrawlerDbContext db) =>
             th => new ThreadRevision {TakenAt = th.UpdatedAt ?? th.CreatedAt, Tid = th.Tid},
             PredicateBuilder.New<ThreadPost>(th => Posts.Keys.Contains(th.Tid)));
 
+    protected override Tid RevisionEntityIdSelector(BaseThreadRevision entity) => entity.Tid;
+    protected override Expression<Func<BaseThreadRevision, bool>>
+        IsRevisionEntityIdEqualsExpression(BaseThreadRevision newRevision) =>
+        existingRevision => existingRevision.Tid == newRevision.Tid;
+
     protected override bool FieldUpdateIgnorance
         (string propName, object? oldValue, object? newValue) => propName switch
     { // will be updated by ThreadLateCrawler and ThreadLateCrawlFacade
diff --git a/c#/crawler/src/Tieba/Crawl/Saver/SaverWithRevision.cs b/c#/crawler/src/Tieba/Crawl/Saver/SaverWithRevision.cs
index e78179a3..2086010b 100644
--- a/c#/crawler/src/Tieba/Crawl/Saver/SaverWithRevision.cs
+++ b/c#/crawler/src/Tieba/Crawl/Saver/SaverWithRevision.cs
@@ -11,37 +11,22 @@ public abstract partial class SaverWithRevision<TBaseRevision, TEntityId>(
     protected abstract Lazy<Dictionary<Type, AddSplitRevisionsDelegate>>
         AddSplitRevisionsDelegatesKeyByEntityType { get; }
 
-    protected abstract NullFieldsBitMask GetRevisionNullFieldBitMask(string fieldName);
-
-    protected abstract TEntityId RevisionEntityIdSelector(TBaseRevision entity);
-    protected abstract Expression<Func<TBaseRevision, bool>>
-        IsRevisionEntityIdEqualsExpression(TBaseRevision newRevision);
-
-    protected virtual bool ShouldIgnoreEntityRevision(string propName, PropertyEntry propEntry, EntityEntry entityEntry) => false;
-    protected virtual bool FieldUpdateIgnorance(string propName, object? oldValue, object? newValue) => false;
-    protected virtual bool FieldRevisionIgnorance(string propName, object? oldValue, object? newValue) => false;
-    private static bool GlobalFieldUpdateIgnorance(string propName, object? oldValue, object? newValue) => propName switch
-    { // possible rarely respond with the protoBuf default value 0
-        nameof(BasePost.AuthorUid) when newValue is 0L && oldValue is not null => true,
-        _ => false
-    };
-
     protected void AddSplitRevisions<TRevision>(CrawlerDbContext db, IEnumerable<TBaseRevision> revisions)
         where TRevision : TBaseRevision
     {
         var newRevisions = revisions.OfType<TRevision>().ToList();
         var dbSet = db.Set<TRevision>();
         var visitor = new ReplaceParameterTypeVisitor<TBaseRevision, TRevision>();
+
+        // https://github.com/npgsql/npgsql/issues/4437
+        // https://github.com/dotnet/efcore/issues/32092
         var existingRevisions = dbSet
             .Where(newRevisions.Aggregate(
-
-                // https://github.com/npgsql/npgsql/issues/4437
-                // https://github.com/dotnet/efcore/issues/32092
                 LinqKit.PredicateBuilder.New<TRevision>(),
                 (predicate, newRevision) => predicate.Or(LinqKit.PredicateBuilder
                     .New<TRevision>(existingRevision => existingRevision.TakenAt == newRevision.TakenAt)
-                    .And((Expression<Func<TRevision, bool>>)
-                        visitor.Visit(IsRevisionEntityIdEqualsExpression(newRevision))))))
+                    .And((Expression<Func<TRevision, bool>>)visitor
+                        .Visit(IsRevisionEntityIdEqualsExpression(newRevision))))))
             .ToList();
         (from existingRevision in existingRevisions
                 join newRevision in newRevisions
@@ -51,6 +36,21 @@ on RevisionEntityIdSelector(existingRevision) equals RevisionEntityIdSelector(ne
                 t.newRevision.DuplicateIndex = (ushort)(t.existingRevision.DuplicateIndex + 1));
         dbSet.AddRange(newRevisions);
     }
+
+    protected abstract NullFieldsBitMask GetRevisionNullFieldBitMask(string fieldName);
+
+    protected abstract TEntityId RevisionEntityIdSelector(TBaseRevision entity);
+    protected abstract Expression<Func<TBaseRevision, bool>>
+        IsRevisionEntityIdEqualsExpression(TBaseRevision newRevision);
+
+    protected virtual bool ShouldIgnoreEntityRevision(string propName, PropertyEntry propEntry, EntityEntry entityEntry) => false;
+    protected virtual bool FieldUpdateIgnorance(string propName, object? oldValue, object? newValue) => false;
+    protected virtual bool FieldRevisionIgnorance(string propName, object? oldValue, object? newValue) => false;
+    private static bool GlobalFieldUpdateIgnorance(string propName, object? oldValue, object? newValue) => propName switch
+    { // possible rarely respond with the protoBuf default value 0
+        nameof(BasePost.AuthorUid) when newValue is 0L && oldValue is not null => true,
+        _ => false
+    };
 }
 public abstract partial class SaverWithRevision<TBaseRevision, TEntityId>
 {