Tong'an District is a northern mainland district of Amoy which faces Quemoy County, Republic of China. To the north is Anxi and Nan'an, and to the south is Jimei. Tong'an is also east of Lianxiang and Changqin to the West. It covers 657.59 square kilometres Tong'an District has a population of 496,129 residents. Wikipedia