In the history of friendship, it was called Zhennanguan. It is located at the southwestern end of Pingxiang City in Chongzuo City. The 322 National Road Terminal passes through the Friendship Gate and connects with the Vietnamese Highway. It is an important land passage to Vietnam and a national first-class port. It is one of the nine famous names in China. It is the only one in the current Jiuguanguan that is still exercising the customs clearance function. It is also the biggest and most important defense on the Sino-Vietnamese border.