Xin'an County
The area around Tuen Mun, excluding Tai Lam and Lung Kwu Tan, was placed under Yuen Long "yeuk" () soon after the signing of the Convention for the Extension of Hong Kong Territory in 1898. The Convention leased the New Territories and New Kowloon to the British Empire as an extension of the Colony of Hong Kong. Before the lease, Tuen Man was part of the Xin'an County. In the "Xin'an Xianzhi" (literally "Gazetteer of the Xin'an County") Kangxi edition, Tuen Mun village was under the administration of "Wu-dou" (). Also under "Wu-dou", were Kam Tin, Ping Shan, Yuen Long and Shek Kong. They were areas of the modern day Yuen Long District.