diff --git a/UpdateLog-en.md b/UpdateLog-en.md
index b696dceda..40e186b52 100644
--- a/UpdateLog-en.md
+++ b/UpdateLog-en.md
@@ -2,6 +2,11 @@
 
 Note: Not all versions in this update log are already published. Please refer to relevant pages in CurseForge and Modrinth, or the "releases" section in the GitHub.
 
+### 1.2.1
+- Fixed the wrong model of road slab blocks.
+- Fixed the issue that using road connection state debugging tool may cause crashes.
+- Added more links in the Mod Menu screen.
+
 ### 1.2.0
 
 - Adapted to new version BRRP.
diff --git a/UpdateLog.md b/UpdateLog.md
index 889b20ad4..d0ec539c0 100644
--- a/UpdateLog.md
+++ b/UpdateLog.md
@@ -2,6 +2,11 @@
 
 注意：更新记录中的版本并不一定都已发布。具体请以 CurseForge、Modrinth 中的下载页面或 GitHub 中的“releases”为准。
 
+### 1.2.1
+- 修复了错误的道路台阶模型。
+- 修复了使用道路连接状态调试工具可能导致崩溃的问题。
+- 在 Mod Menu 的屏幕中添加的更多的链接。
+
 ### 1.2.0
 
 - 适应新版本的 BRRP。
diff --git a/gradle.properties b/gradle.properties
index c373298c4..29cce3953 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -14,7 +14,7 @@ fabric_version=0.76.0+1.19.2
 brrp_version=1.0.0
 
 # Mod Properties
-mod_version=1.2.0
+mod_version=1.2.1
 maven_group=pers.solid
 archives_base_name=mishanguc
 
diff --git a/src/main/java/pers/solid/mishang/uc/arrp/BRRPHelper.java b/src/main/java/pers/solid/mishang/uc/arrp/BRRPHelper.java
index 65b2ef184..3ece01379 100644
--- a/src/main/java/pers/solid/mishang/uc/arrp/BRRPHelper.java
+++ b/src/main/java/pers/solid/mishang/uc/arrp/BRRPHelper.java
@@ -67,7 +67,7 @@ public static BlockStateSupplier composeStateForSlab(@NotNull BlockStateSupplier
             key.isEmpty() ? "type=bottom" : key + ",type=bottom",
             bottomModel);
         JsonObject topModel = blockModel.deepCopy();
-        topModel.addProperty("mode", slabOf(modelId).toString());
+        topModel.addProperty("model", slabOf(modelId).brrp_suffixed("_top").toString());
         slabVariant.add(
             key.isEmpty() ? "type=top" : key + ",type=top",
             topModel);
diff --git a/src/main/java/pers/solid/mishang/uc/item/RoadConnectionStateDebuggingToolItem.java b/src/main/java/pers/solid/mishang/uc/item/RoadConnectionStateDebuggingToolItem.java
index 8c43d411d..cdbde8cf4 100644
--- a/src/main/java/pers/solid/mishang/uc/item/RoadConnectionStateDebuggingToolItem.java
+++ b/src/main/java/pers/solid/mishang/uc/item/RoadConnectionStateDebuggingToolItem.java
@@ -45,19 +45,17 @@ public static ActionResult sendMessageOfState(
         TextBridge.translatable("debug.mishanguc.roadConnectionState.allDir", String.format("%s %s %s", blockPos.getX(), blockPos.getY(), blockPos.getZ()))
             .formatted(Formatting.YELLOW),
         false);
-    Direction.Type.HORIZONTAL.forEach(
-        direction -> {
-          final RoadConnectionState connectionState =
-              road.getConnectionStateOf(blockState, direction);
-          playerEntity.sendMessage(
-              TextBridge.translatable("debug.mishanguc.roadConnectionState.brief",
-                  RoadConnectionState.text(direction),
-                  (connectionState.offsetLevel() == 0 ? RoadConnectionState.text(connectionState.direction()) : TextBridge.translatable("debug.mishanguc.roadConnectionState.offset", RoadConnectionState.text(direction), RoadConnectionState.text(connectionState.offsetDirection()), connectionState.offsetLevel())).formatted(Formatting.WHITE),
-                  RoadConnectionState.text(connectionState.lineColor()),
-                  RoadConnectionState.text(connectionState.lineType()).formatted(Formatting.WHITE),
-                  RoadConnectionState.text(connectionState.whetherConnected())).styled(style -> style.withColor(0xcccccc)),
-              false);
-        });
+    for (Direction direction : Direction.Type.HORIZONTAL) {
+      final RoadConnectionState connectionState = road.getConnectionStateOf(blockState, direction);
+      playerEntity.sendMessage(
+          TextBridge.translatable("debug.mishanguc.roadConnectionState.brief",
+              RoadConnectionState.text(direction),
+              (connectionState.offsetLevel() == 0 ? RoadConnectionState.text(connectionState.direction()) : TextBridge.translatable("debug.mishanguc.roadConnectionState.offset", RoadConnectionState.text(direction), RoadConnectionState.text(connectionState.offsetDirection()), connectionState.offsetLevel())).formatted(Formatting.WHITE),
+              RoadConnectionState.text(connectionState.lineColor()),
+              RoadConnectionState.text(connectionState.lineType()).formatted(Formatting.WHITE),
+              RoadConnectionState.text(connectionState.whetherConnected())).styled(style -> style.withColor(0xcccccc)),
+          false);
+    }
     return ActionResult.SUCCESS;
   }
 
diff --git a/src/main/java/pers/solid/mishang/uc/util/EightHorizontalDirection.java b/src/main/java/pers/solid/mishang/uc/util/EightHorizontalDirection.java
index 560e4b506..1a2bfbf00 100644
--- a/src/main/java/pers/solid/mishang/uc/util/EightHorizontalDirection.java
+++ b/src/main/java/pers/solid/mishang/uc/util/EightHorizontalDirection.java
@@ -47,11 +47,11 @@ public enum EightHorizontalDirection implements StringIdentifiable {
     this.axis = axis;
   }
 
-  public static EightHorizontalDirection of(Direction direction) {
+  public static @NotNull EightHorizontalDirection of(@NotNull Direction direction) {
     return DIRECTIONS.get(direction);
   }
 
-  public static EightHorizontalDirection of(HorizontalCornerDirection cornerDirection) {
+  public static @NotNull EightHorizontalDirection of(@NotNull HorizontalCornerDirection cornerDirection) {
     return CORNER_DIRECTIONS.get(cornerDirection);
   }
 
diff --git a/src/main/java/pers/solid/mishang/uc/util/RoadConnectionState.java b/src/main/java/pers/solid/mishang/uc/util/RoadConnectionState.java
index 68994ccd8..2919e4c2a 100644
--- a/src/main/java/pers/solid/mishang/uc/util/RoadConnectionState.java
+++ b/src/main/java/pers/solid/mishang/uc/util/RoadConnectionState.java
@@ -20,9 +20,9 @@
  * @param lineOffset       该道路连接状态的偏移。
  * @since 0.2.0-mc1.17+ 此类更改为记录；1.16.5 由于仍为 Java 8，因此仍使用普通类的形式。
  */
-public record RoadConnectionState(WhetherConnected whetherConnected, LineColor lineColor, EightHorizontalDirection direction, LineType lineType, @Nullable LineOffset lineOffset) implements Comparable<RoadConnectionState> {
+public record RoadConnectionState(WhetherConnected whetherConnected, LineColor lineColor, @Nullable EightHorizontalDirection direction, LineType lineType, @Nullable LineOffset lineOffset) implements Comparable<RoadConnectionState> {
 
-  public RoadConnectionState(WhetherConnected whetherConnected, LineColor lineColor, EightHorizontalDirection direction, LineType lineType) {
+  public RoadConnectionState(WhetherConnected whetherConnected, LineColor lineColor, @Nullable EightHorizontalDirection direction, LineType lineType) {
     this(whetherConnected, lineColor, direction, lineType, null);
   }
 
@@ -46,11 +46,15 @@ public static MutableText text(@Nullable Direction direction) {
     return TextBridge.translatable("direction." + direction.asString());
   }
 
-  public static MutableText text(HorizontalCornerDirection direction) {
-    return TextBridge.translatable("direction." + direction.asString());
+  public static MutableText text(@Nullable HorizontalCornerDirection direction) {
+    if (direction == null) {
+      return TextBridge.translatable("direction.none");
+    } else {
+      return TextBridge.translatable("direction." + direction.asString());
+    }
   }
 
-  public static MutableText text(Either<Direction, HorizontalCornerDirection> direction) {
+  public static MutableText text(@Nullable Either<Direction, HorizontalCornerDirection> direction) {
     if (direction == null) {
       return TextBridge.translatable("direction.none");
     } else {
@@ -58,11 +62,11 @@ public static MutableText text(Either<Direction, HorizontalCornerDirection> dire
     }
   }
 
-  public static MutableText text(EightHorizontalDirection direction) {
-    return text(direction.either);
+  public static MutableText text(@Nullable EightHorizontalDirection direction) {
+    return direction == null ? text((Direction) null) : text(direction.either);
   }
 
-  public static MutableText text(WhetherConnected whetherConnected) {
+  public static MutableText text(@NotNull WhetherConnected whetherConnected) {
     return TextBridge.translatable("roadConnectionState.whether." + whetherConnected.asString()).formatted(switch (whetherConnected) {
       case NOT_CONNECTED -> Formatting.RED;
       case CONNECTED -> Formatting.GREEN;
@@ -70,7 +74,7 @@ public static MutableText text(WhetherConnected whetherConnected) {
     });
   }
 
-  public static MutableText text(LineColor lineColor) {
+  public static MutableText text(@NotNull LineColor lineColor) {
     return lineColor.getName().formatted(switch (lineColor) {
       case WHITE -> Formatting.WHITE;
       case YELLOW -> Formatting.YELLOW;
@@ -78,7 +82,7 @@ public static MutableText text(LineColor lineColor) {
     });
   }
 
-  public static MutableText text(LineType lineType) {
+  public static MutableText text(@NotNull LineType lineType) {
     return lineType.getName();
   }
 
diff --git a/src/main/resources/fabric.mod.json b/src/main/resources/fabric.mod.json
index f699de0d2..56989470c 100644
--- a/src/main/resources/fabric.mod.json
+++ b/src/main/resources/fabric.mod.json
@@ -44,5 +44,14 @@
   "breaks": {
     "minecraft": ">=1.19.3"
   },
-  "custom": {"branch": "1.19.2"}
+  "custom": {
+    "branch": "1.19.2",
+    "modmenu": {
+      "links": {
+        "mcmod.cn": "https://www.mcmod.cn/class/5743.html",
+        "modmenu.modrinth": "https://modrinth.com/mod/mishang-urban-construction",
+        "modmenu.curseforge": "https://www.curseforge.com/minecraft/mc-mods/mishang-urban-construction"
+      }
+    }
+  }
 }