17。 According to the official inquiry of Huixian Life Network, there are 17 wedding companies in Huixian. Huixian County belongs to Longnan City, Gansu Province. Named after Huishan Hill in the north corner of the city. It is located in the southeast of Gansu Province and the northeast of Longnan City. It is located in Huicheng Basin in Qinba Mountain area at the southern foot of Qinling Mountains and the upper reaches of Jialing River.