Traditionally, the Teochews comprise a majority population of coastal provinces like Bangkok, Chonburi and Chachoengsao until the 1950s, in which later it was overwhelmed by Central Thai internal immigrants. Many of Thai military commanders as well as politicians come from Teochew backgrounds, while others were involved in trade. During the reign of King Taksin, some influential Teochew traders were granted certain privileges. These prominent traders were called "royal Chinese" (Jin-luang or จีนหลวง in Thai).
