diff --git a/.prettierrc.json b/.prettierrc.json
index 26f3743..eafc848 100644
--- a/.prettierrc.json
+++ b/.prettierrc.json
@@ -5,5 +5,6 @@
   "singleQuote": true,
   "semi": true,
   "trailingComma": "none",
-  "bracketSpacing": true
+  "bracketSpacing": true,
+  "endOfLine": "auto"
 }
diff --git a/README.md b/README.md
index 774c215..e10b914 100644
--- a/README.md
+++ b/README.md
@@ -6,9 +6,10 @@
 - 💪 功能完备，当前可跑通官方测试用例数量：34
 - 🚶 按`Git Tag`划分迭代步骤，记录从 0 实现的每个功能
 
-如果想加入项目对应的`源码交流群`，和 7000+小伙伴们一起交流`React`，可以加我微信，备注「开发」：
+如果想跟着我学习「如何从0到1实现React18」，可以购买如下课程：
+
+<img width="200" src="https://user-images.githubusercontent.com/15828041/204089108-eaccf461-1521-4a68-bcd1-d04aef1bd6ad.png" alt="卡颂" />
 
-<img width="200" src="https://user-images.githubusercontent.com/15828041/181666959-57941b01-61b3-47db-9d73-ecc9ae175112.png" alt="卡颂的微信" />
 
 ## TODO List
 
diff --git a/packages/react-reconciler/src/commitWork.ts b/packages/react-reconciler/src/commitWork.ts
index 7875ae9..be1fb55 100644
--- a/packages/react-reconciler/src/commitWork.ts
+++ b/packages/react-reconciler/src/commitWork.ts
@@ -69,7 +69,7 @@ const commitMutationEffectsOnFiber = (
 	if ((flags & Placement) !== NoFlags) {
 		// 插入/移动
 		commitPlacement(finishedWork);
-		finishedWork.flags &= ~Placement;
+		finishedWork.flags ^= Placement;
 	}
 	if ((flags & ChildDeletion) !== NoFlags) {
 		const deletions = finishedWork.deletions;
@@ -79,16 +79,16 @@ const commitMutationEffectsOnFiber = (
 				commitDeletion(childToDelete, root);
 			});
 		}
-		finishedWork.flags &= ~ChildDeletion;
+		finishedWork.flags ^= ChildDeletion;
 	}
 	if ((flags & Update) !== NoFlags) {
 		commitUpdate(finishedWork);
-		finishedWork.flags &= ~Update;
+		finishedWork.flags ^= Update;
 	}
 	if ((flags & PassiveEffect) !== NoFlags) {
 		// 收集因deps变化而需要执行的useEffect
 		commitPassiveEffect(finishedWork, root, 'update');
-		finishedWork.flags &= ~PassiveEffect;
+		finishedWork.flags ^= PassiveEffect;
 	}
 };
 
@@ -309,7 +309,7 @@ export function commitHookEffectListDestroy(flags: Flags, lastEffect: Effect) {
 			destroy();
 		}
 		// 后续不会再触发create
-		effect.tag &= ~HookHasEffect;
+		effect.tag ^= HookHasEffect;
 	});
 }