diff --git a/articles/20220816-introduction-to-qemu-and-riscv-upstream-boot-flow.md b/articles/20220816-introduction-to-qemu-and-riscv-upstream-boot-flow.md
index d386fb70d1c936ce0fefe268e878fbdc92535e1d..a6c95c03bfe948c660584297c0831e76091aa951 100644
--- a/articles/20220816-introduction-to-qemu-and-riscv-upstream-boot-flow.md
+++ b/articles/20220816-introduction-to-qemu-and-riscv-upstream-boot-flow.md
@@ -171,6 +171,8 @@ $ cd linux-kernel
 $ git init
 $ git fetch git@gitee.com:mirrors/linux_old1.git
 // 如果断了，可以多次执行 git fetch，以便实现续传
+$ git remote add origin git@gitee.com:mirrors/linux_old1.git
+$ git pull origin
 $ git checkout v5.18
 ```
 
diff --git a/ppt/sfd2023-riscv-emulator-develop-and-analyze.pptx b/ppt/sfd2023-riscv-emulator-develop-and-analyze.pptx
new file mode 100755
index 0000000000000000000000000000000000000000..d9adf1b6d03f1a7e20a54a3b31c934a21b49c263
Binary files /dev/null and b/ppt/sfd2023-riscv-emulator-develop-and-analyze.pptx differ