Zhang's source department? Forget about ancient Chinese. Oh, I'm not good at China literature, so I can't understand it!

1. Wang Song Anshi's poem "Zhun Han Shan Shi": "Zhang San's pants are narrow and Li Si's eaves are long."

2. Zhang San, Li Si, Wang Wu and Liu Zhao "mentioned the four major surnames of Hangzhou for the first time, 18. Hangzhou was the capital of Wu Yue State in the Five Dynasties and the Southern Song Dynasty. It used to be the political, economic and cultural center of the whole country. The city was prosperous and the population came from all directions. Later, after the war, the population moved frequently. According to legend, only 18 Hangzhou people are left, which is the so-called popular saying.