diff --git a/src/main/java/com/github/zly2006/carpetslsaddition/command/HatCommand.java b/src/main/java/com/github/zly2006/carpetslsaddition/command/HatCommand.java
index 9eb0d03..13ee671 100644
--- a/src/main/java/com/github/zly2006/carpetslsaddition/command/HatCommand.java
+++ b/src/main/java/com/github/zly2006/carpetslsaddition/command/HatCommand.java
@@ -11,11 +11,14 @@ import net.minecraft.world.item.ItemStack;
 public class HatCommand {
     public static void register(CommandDispatcher<CommandSourceStack> dispatcher) {
         dispatcher.register(Commands.literal("hat")
-                .requires(CommandSourceStack::isPlayer)
-                .requires((commandSource) -> SLSCarpetSettings.canUseHatCommand)
                 .executes(context -> {
+                    if (!SLSCarpetSettings.canUseHatCommand) {
+                        return 0;
+                    }
                     ServerPlayer player = context.getSource().getPlayer();
-                    assert player != null;
+                    if (player == null) {
+                        return 0;
+                    }
                     ItemStack stack = player.getMainHandItem();
                     ItemStack head = player.getItemBySlot(EquipmentSlot.HEAD);
                     player.setItemSlot(EquipmentSlot.HEAD, stack);
diff --git a/src/main/java/com/github/zly2006/carpetslsaddition/command/SitCommand.java b/src/main/java/com/github/zly2006/carpetslsaddition/command/SitCommand.java
index 513576a..5406532 100644
--- a/src/main/java/com/github/zly2006/carpetslsaddition/command/SitCommand.java
+++ b/src/main/java/com/github/zly2006/carpetslsaddition/command/SitCommand.java
@@ -12,11 +12,14 @@ import net.minecraft.world.entity.decoration.ArmorStand;
 public class SitCommand {
     public static void register(CommandDispatcher<CommandSourceStack> dispatcher) {
         dispatcher.register(Commands.literal("sit")
-                .requires(CommandSourceStack::isPlayer)
-                .requires((commandSource) -> SLSCarpetSettings.canUseSitCommand)
                 .executes(context -> {
+                    if (!SLSCarpetSettings.canUseSitCommand) {
+                        return 0;
+                    }
                     ServerPlayer player = context.getSource().getPlayer();
-                    assert player != null;
+                    if (player == null) {
+                        return 0;
+                    }
 
                     if (player.getVehicle() != null || !player.onGround()) {  // 防止错误的坐下行为
                         return 1;
diff --git a/src/main/java/com/github/zly2006/carpetslsaddition/mixin/block/MixinTrialSpawnerState.java b/src/main/java/com/github/zly2006/carpetslsaddition/mixin/block/MixinTrialSpawnerState.java
index 45561ab..c6f5129 100644
--- a/src/main/java/com/github/zly2006/carpetslsaddition/mixin/block/MixinTrialSpawnerState.java
+++ b/src/main/java/com/github/zly2006/carpetslsaddition/mixin/block/MixinTrialSpawnerState.java
@@ -10,15 +10,17 @@ import org.spongepowered.asm.mixin.injection.At;
 
 @Mixin(TrialSpawnerState.class)
 public class MixinTrialSpawnerState {
+    // trialSpawnerCD：覆盖试炼刷怪笼的冷却长度。
+    // 新版 TrialSpawnerState.tickAndGetNext 里调用 TrialSpawner.getTargetCooldownLength() 三次，
+    // 不指定 ordinal 以覆盖全部调用。
     @WrapOperation(
             method = "tickAndGetNext",
             at = @At(
                     value = "INVOKE",
-                    ordinal = 0,
                     target = "Lnet/minecraft/world/level/block/entity/trialspawner/TrialSpawner;getTargetCooldownLength()I"
             )
     )
-    private int tick(TrialSpawner instance, Operation<Integer> original)  {
+    private int tick(TrialSpawner instance, Operation<Integer> original) {
         if (SLSCarpetSettings.trialSpawnerCD < 0) {
             return original.call(instance);
         } else {