there is an exchange of calls
In Chinese, Pinyin is y ǒ UL á iy ǒ UW ǎ ng, which means equal action. The reference varies from text to text. From how to be a little gentleman.
The origin of Idioms
Tao Zhixing's how to be a little gentleman: "if you ask him modestly, he will also ask you modestly. The best education is coming and going. "
Idiom usage
The best way to communicate with others is to go back and forth.
there is an exchange of calls
author with many works to his credit - zhù shù děng shēn
Friends compete with each other - péng dǎng bǐ zhōu