同舟共济 (tóng zhōu gòng jì)
In the Spring and Autumn period (春秋 chūn qiū,770 — 221BC), the Wu State (wú guó 吴国 ) and the Yue State (yuè guó 越国) often dig up the hatchet with each other, which sew the seeds of hatred in the heart of both people of the two countries. During one year, both states were seriously strikened by the flood. They had to row the same boat since the severe boat shortage at that time. When the boat went to the middle of the river, there blew a strong wind. The boat rocked in the water. The people of the two countries worked in full cooperation and with unity of purpose. In the end, they all went shore safely. Nowadays,” Crossing a River in the Same Boat “means pulling together to overcome difficulties.