Zheng in the south should have immigrated from the north.

In the pre-Qin period, Zheng was mainly distributed in Shaanxi, Henan and Shandong. Among them, Shandong Zheng's ancestral home (now Philadelphia) is the descendant of the former Zheng's stationed personnel.

During the Warring States period, it began to enter Sichuan, Shanxi, Shandong, Hebei and other places.

During the Wei, Jin, Southern and Northern Dynasties, the northern part of China was in turmoil for many times, and the southern part was relatively stable, which led to the migration of the population of the Central Plains to the south. In the first year of Jin Yongjia (307), Yao Zheng, the ancestor of Jin Yongjia, moved south. He used to be a long-time Wu riding a chariot and a general in Pingnan, and later became the prefect of Dong 'an, guarding Danyang. Yao Zheng's second son, Zheng Zhao, was General Longxiang of the Eastern Jin Dynasty. He opened the state and led the army into Fujian, which was called "the ancestor of Fujian".

By the end of the Tang Dynasty, the Central Plains moved south to Fujian, and a large number of ancestors named Zheng settled in Fujian, and the center of Zheng began to form in the southeast coast.