There are few Hakka mountainous areas in the west, such as Laixing, which seems to be concentrated in the mountainous areas in the west of Puning, but there are also large settlements in the Xiaobeishan area in the east of Puning. Judging from Zheng He's surname, Zheng seems to like to gather in Hakka mountainous areas in the west of Puning.
A large number of surnames live together in Chaoshan area, which often leads to the phenomenon of "Chen, the world is half". Puning's most famous surnames, such as "Puning Chen", "Puning Hakka four families: Zhenglai" and "Hongyang Fangban Town", all have obvious geographical distribution characteristics in Puning.
For example, Chen's surname is distributed in Lianjiang Plain along Puning Guangshan Highway in a large area with high density, but less in Rongjiang Plain in the northeast and northwest.