tree 69106f01c3e41406487839fba0aa2592f46ce2a2
parent e0f22e7abfda08f7ae04e347d779b3cffd1ea8be
author fengqing <fengqing@sunlands.com> 1563782917 +0800
committer fengqing <fengqing@sunlands.com> 1563782917 +0800

amend the use example