Xin'an County
Under the Qing Dynasty, Xin'an County was one of the fourteen districts under the department of Guangdong. During the Great Clearance (1661–1669), most of Xin'an County was affected by the coastal evacuation. However Xin'an ceased to be a separate administrative county by the 5th year of Kangxi (1666), and the areas not affected by the evacuation were temporarily absorbed into the adjoining Dongguan County until the lift of the ban in 1669. From 1842 to 1898, 1055.61 km2 out of 3076 km2 of Xin'an County was ceded to the United Kingdom to form Hong Kong.