From b403e1c3b4d854683bf001e2a7b0d3d78125f299 Mon Sep 17 00:00:00 2001
From: xushanpu123 <50659045+xushanpu123@users.noreply.github.com>
Date: Sun, 3 Jul 2022 10:13:55 +0000
Subject: [PATCH 1/2] QA.md

---
 QA.md | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)
 create mode 100644 QA.md

diff --git a/QA.md b/QA.md
new file mode 100644
index 0000000..c1e1513
--- /dev/null
+++ b/QA.md
@@ -0,0 +1,21 @@
+Q1:已经在classroom中建立了自己的仓库（例如 “LearningOS/lab0-0-setup-env-run-os1-chyyuu2022"），但是源仓库“LearningOS/rust-based-os-comp2022“更新了，如何处理？
+
+A：
+
+**方法一：**
+
+​       向管理员“助教许善朴”申请删除已生成仓库，再点击 链接重新创建仓库。
+
+**方法二：**
+
+​       在自己构建的仓库根目录下执行以下命令:
+
+```makefile
+git remote add upstream "https://github.com/LearningOS/rust-based-os-comp2022.git"
+git fetch upstream
+git checkout -b foo
+git branch -D main
+git checkout -t upstream/main
+git reset --hard origin/main
+git push -f
+```
\ No newline at end of file

From 3f633536d1e3540f340e9cf1896f713d24ace401 Mon Sep 17 00:00:00 2001
From: xushanpu123 <798304030@qq.com>
Date: Sun, 3 Jul 2022 18:16:32 +0800
Subject: [PATCH 2/2]

---
 QA.md | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/QA.md b/QA.md
index c1e1513..83e3f43 100644
--- a/QA.md
+++ b/QA.md
@@ -18,4 +18,5 @@ git branch -D main
 git checkout -t upstream/main
 git reset --hard origin/main
 git push -f
-```
\ No newline at end of file
+```
+