Gu'an
Gu'an ( Chinese 固安县 , Pinyin Gù'ān Xiàn ) is a district of the prefecture -level city of Langfang in the Chinese province of Hebei . It has an area of 697 km² and has a population of 390,000. Its main town is the large community of Gu'an (固 安镇).
Coordinates: 39 ° 27 ' N , 116 ° 18' E