I just wrote a shell file to finish it.
# Disable the system source
sudo zypper mr -da
# Add aliyun mirrors
sudo zypper addrepo -f openSUSE-42.3-Update-Non-Oss
sudo zypper addrepo -f openSUSE-42.3-Oss
sudo zypper addrepo -f openSUSE-42.3-Non-Oss
sudo zypper addrepo -f openSUSE-42.3-packman
# refresh
sudo zypper ref
# Update
# sudo zypper up