diff --git a/docs/schedule.md b/docs/schedule.md
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@@ -24,9 +24,8 @@
 | #19                                          | 11-19 | 程序语言设计分享                                                                                                                                                                                                                                                                                                  |                                                                                                                                                     |
 | #20                                          | 11-24 | 中间表示：[part1](./slides/2024/07-ir-part1.pdf), [part2](./slides/2024/07-ir-part2.pdf)                                                                                                                                                                                                                          | 书本第 7 章，[AICompiler](./slides/AICompiler.pdf)                                                                                                  |
 | #21                                          | 11-26 | _ = _                                                                                                                                                                                                                                                                                                             | _ = _                                                                                                                                               |
-| 未完待续                                     | :~~:  | :~~:                                                                                                                                                                                                                                                                                                              | :~~:                                                                                                                                                |
 |                                              |       | 代码生成：[codegen](./slides/2024/08-codegen.pdf)                                                                                                                                                                                                                                                                 |                                                                                                                                                     |
-|                                              |       | 代码优化：[optimize](./slides/2024/09-optimize.pdf)                                                                                                                                                                                                                                                               |                                                                                                                                                     |
+|                                              |       | 代码优化：[optimize](./slides/09-optimize.pdf)（已更新 2025 版）                                                                                                                                                                                                                                                  |                                                                                                                                                     |
 
 ## 作业
 
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