From b32227e78c21bb6e254862f95489793eb6260306 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E9=97=AA=E5=AE=A2sun?= <18811311416@sina.cn>
Date: Tue, 23 Nov 2021 14:06:55 +0800
Subject: [PATCH] Update README.md

---
 README.md | 1 +
 1 file changed, 1 insertion(+)

diff --git a/README.md b/README.md
index d43eed5..9a5a0d9 100644
--- a/README.md
+++ b/README.md
@@ -40,6 +40,7 @@
    * [第一回 最开始的两行代码](https://mp.weixin.qq.com/s/LIsqRX51W7d_yw-HN-s2DA)
    * [第二回 自己给自己挪个地儿](https://mp.weixin.qq.com/s/U-txDYt0YqLh5EeFOcB4NQ)
    * [第三回 做好最最基础的准备工作](https://mp.weixin.qq.com/s/90QBJ-lP_-du2qQJxNF-Fw)
+   * [第四回 把自己在硬盘里的其他部分也放到内存来](https://mp.weixin.qq.com/s/hStc-y-sabP-KwJUDUesTw)
 
 * **第二部分：大战前期的初始化工作**