1. A fall into the pit, a gain in your wit. 吃一堑，长一智。
2. A common danger causes common action. 同舟共济。
3. A contented mind is a continual / perpetual feast. 知足常乐。
4. A bosom friend afar brings a distant land near. 海内存知己，天涯若比邻。
5. A guest should suit the convenience of the host. 客随主便。