There are 3 factories producing river flour in Chang 'an Town, Dongguan City. Chang 'an Town, Dongguan produces vermicelli factory, including Chang 'an Ha Lu vermicelli processing factory, Chang 'an Chang Ha vermicelli processing factory and Chang 'an Lotus vermicelli factory. Therefore, there are three factories producing river flour in Chang 'an Town, Dongguan. Chang 'an Town, which belongs to Dongguan City, Guangdong Province, is located at the southern end of Dongguan City, on the southeast bank of the Pearl River Estuary, with Songgang Street in Baoan District, Shenzhen in the east, Lingdingyang in the Pearl River Estuary in the south, Humen Town in the west and Dalingshan Town in the north.