Why are Fujian's talents authentic Central Plains people?

In the late Western Jin Dynasty, there were frequent civil strife in the Central Plains, and people from all walks of life fled south and moved to various provinces in the south of the Yangtze River. Some people moved to Fujian province, including Chen. Chen and Lin, Huang, Zheng, Zhan, Qiu, He and Hu were the earliest immigrants who entered Fujian from the Central Plains. The Book of Min records: "In the second year of Yongjia, the Central Plains swayed and clothes began to enter Fujian, so-called Lin, Huang, Chen, Zheng, Zhan, Qiu, He and Hu also."