Xinzhuang District is a district in the western part of New Taipei in northern Taiwan. It has an area of 19.74 km² and a population of 421,248 people. A former name of the area is Pulauan. On 15 January 1980, Xinzhuang was upgraded from an urban township to be a county-administered city of Taipei County. On 25 December 2010, Taipei County was upgraded t…Xinzhuang District is a district in the western part of New Taipei in northern Taiwan. It has an area of 19.74 km² and a population of 421,248 people. A former name of the area is Pulauan. On 15 January 1980, Xinzhuang was upgraded from an urban township to be a county-administered city of Taipei County. On 25 December 2010, Taipei County was upgraded to New Taipei City, and Xinzhuang City was upgraded to a district.