diff --git a/docs/RISC-V64_QEMU.md b/docs/RISC-V64_QEMU.md
index ac861ec..2733206 100644
--- a/docs/RISC-V64_QEMU.md
+++ b/docs/RISC-V64_QEMU.md
@@ -47,8 +47,15 @@ make CROSS_COMPILE=riscv64-unknown-linux-gnu-  ARCH=riscv -j $(nproc --all)
 
 ```
 apt-get install debootstrap qemu-user-static binfmt-support debian-ports-archive-keyring
-debootstrap --arch=riscv64  unstable /home/linux/riscv64-chroot \
+debootstrap --arch=riscv64  --include=debian-ports-archive-keyring \
+unstable /home/linux/riscv64-chroot \
 http://mirrors.perfxlab.cn/debian-ports/
+
+or
+
+debootstrap --arch=riscv64 --foreign --include=debian-ports-archive-keyring  \
+sid /home/linux/riscv64-chroot \
+http://ftp.debian.org/debian-ports/
 ```
 
 ```