What ethnic group are the Hakkas and what are their main differences?

I am happy to answer your question

The Hakka is a Han ethnic group with distinctive characteristics. It is also one of the Han ethnic groups with the widest distribution range and the most far-reaching influence in the world. . They live in some areas of Jiangxi, Sichuan, Guangxi, Hunan, Taiwan, Hainan, and Fujian, including Meizhou, Heyuan, and Huiyang counties in Guangdong, and are distributed in more than 120 counties. They lived in the Yellow River Basin for generations. In the late Western Jin Dynasty (early 4th century) and the late Tang Dynasty (late 9th century), a large number of people moved south due to wars. After the fall of the Southern Song Dynasty in the 1270s, they moved to Jiangxi, Fujian, Guangdong and other places. They call themselves "Hakka" or "Laijin" to distinguish themselves from the locals. Hakka is one of the dialects of Chinese and retains more ancient Chinese phonetics. Folk songs have a unique style. The Hakka people maintain their own customs and traditions in the areas where they live together. Women are naturally talented and participate in labor production. They are not constrained by bad feudal customs and have the courage to make progress. In modern times, after the failure of the Taiping Rebellion, many Hakkas were forced to disperse over a wider area. Some moved to Taiwan, Hong Kong, or settled in Southeast Asia.

There are many theories about the origin of Hakka, the main ones are the Hakka original theory and the Hakka mixed-race theory. The Hakka original theory believes that the main body of the Hakkas are immigrants from the Central Plains, while the Hakka indigenous theory believes that "the Hakka homogeneous body is the homogeneous body produced by the mixing of the Han people who migrated to the south and the ancient Yue immigrants in the Fujian, Guangdong and Jiangxi triangle areas. The main body is the Guyue people living on this land, not the few Central Plains people living in this area." Starting from the Song Dynasty, Han people from the Central Plains migrated southward on a large scale, passing through southern Jiangxi and western Fujian to Meizhou, eventually forming a relatively mature and highly stable Hakka ethnic group. Since then, the Hakka people have used Meizhou as their base and moved to other parts of the country and even the world in large numbers. The "Three Hakka Prefectures" are Jiaying Prefecture, Ganzhou, and Tingzhou.