During the chaos in China, the Hakkas moved south to avoid the years of living with Wuhu, but in the process of moving south, the Hakkas also assimilated some indigenous people in the south. So pure blood is only relative.

Due to the subjugation of the country, the Hakka people moved to the south to live in seclusion in the mountains, with little communication with the outside world, and their language was well maintained, so Hakka dialect is also called "ancient Chinese". Japanese culture has always been influenced by China, so it is normal to have a high degree of similarity with ancient China people.

Whether Sun Yat-sen is a Hakka is controversial. The mainstream thinks that Sun Yat-sen is a Hakka because his ancestral home is Zijin County, Heyuan.

Zhu De is a Hakka in Sichuan, and his ancestral home is the Hakka area in Shaoguan, Guangdong when Guangdong and Guangxi filled Sichuan.

Lee Kuan Yew's ancestral home in Singapore is Longyan, Fujian, which is one of the three largest settlements of Hakka people. There are many Hakkas going to Southeast Asia, so they have a certain influence in Southeast Asia. For example, Thaksin in Thailand is also a Hakka in Fengshun, Meizhou.