diff --git a/ch8/ch8-04-1.md b/ch8/ch8-04-1.md
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+### 8.4.1. 不帶緩存的Channels
+
+TODO
diff --git a/ch8/ch8-04-2.md b/ch8/ch8-04-2.md
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+### 8.4.2. 管道（Pipeline）
+
+TODO
diff --git a/ch8/ch8-04-3.md b/ch8/ch8-04-3.md
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+### 8.4.3. 單向的Channels
+
+TODO
diff --git a/ch8/ch8-04-4.md b/ch8/ch8-04-4.md
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+### 8.4.4. 帶緩存的Channels
+
+TODO
diff --git a/ch8/ch8-04.md b/ch8/ch8-04.md
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-## 8.4. Channels
-
-TODO