Pingxiang is located in the border of the motherland, bordering Liangshan Province in Vietnam in the southwest. Pingxiang has been an important frontier in southwest Guangxi since ancient times, and Friendship Pass is the largest and most important pass on the Sino-Vietnamese border. Located in the southwest of Pingxiang City 18km, high mountains stand on both sides, and the situation is steep and stuck in the canyon passage. It is a tower building, 22 meters high, with thick walls at the bottom and a dome-shaped door in the middle, which is very magnificent. The three characters of "Friendship Pass" embedded in the archway were inscribed by Marshal Chen Yi. This Friendship Pass became the ancient "south gate of the town", and Feng Zicai's victory in the south gate of the town was here.