Wang Chin is a district in the southern part of Phrae province, northern Thailand. Originally the area of the district was part of Mueang Lamp…Wang Chin is a district in the southern part of Phrae province, northern Thailand. Originally the area of the district was part of Mueang Lampang district. In 1930 it was reassigned to Long district, Phrae Province. On 1 March 1939 the minor district Wang Chin was established as a subordinate of Long District, which was upgraded to a full district in 1958.