When did the Hakkas first move south for four times?

The first time: influenced by the five riots, since the Eastern Jin Dynasty, a large number of people from the Central Plains moved south to the Yangtze River basin.

The second time: the Huang Chao Rebellion in the late Tang Dynasty forced the Hakka ancestors to continue southward and reach the junction of Fujian, Guangdong and Jiangxi, becoming the first batch of Hakka ancestors.

The third time: Jin people went south, entered the Central Plains, and crossed in the south. More immigrants gathered here, exchanged and merged with the local aborigines and the She ancestors who moved in early, and finally formed the Hakka clan.

The fourth time: in the late Ming and early Qing dynasties, the Hakka population increased sharply due to limited resources.