mutual exchange of needed products
Chinese idiom, Pinyin is h ù t ō ngy ǒ UW ú, which means to take out your spare things to the other party and exchange with them to get what you lack. It comes from Yuan Dao by Han Yu of Tang Dynasty.
The origin of Idioms
Han Yu, Tang Dynasty, wrote in Yuan Dao: "to be good at it, to know whether it exists or not."
Idiom usage
Zheng He's voyages to the west, and many other countries. The third act of "Wang Zhaojun" by Cao Yu: "now the Han and Hungarian dynasties are in full swing
mutual exchange of needed products
said of a widow or concubine who remarried - pí pá bié bào
board is erected in the transportation hub for people to write comments - fěi bàng zhī mù
Great drought and bright clouds - dà hàn wàng yún ní
The people are harmed by justice - cán mín hài lǐ