Zhennan Pass is 18 kilometers south of Pingxiang City. As early as two thousand years ago, the Han Dynasty set up a gate here, initially called "Yongji Pass", later renamed "Jieshou Pass" and "Danan Pass". In the first year of Hongwu of Ming Dynasty (1368), it was rebuilt as a two-story gatehouse for the consolidation of the southern border. Later renamed Zhennan Pass. And in the Jinji Mountain steep wall to build a number of turrets overlooking the control of the pass. Guancheng near the overlapping mountains, deep valleys and lush forests, the terrain is dangerous, one of the key traffic junctions from China to Vietnam, anciently known as the "Southern Frontier Fortress". Qing Guangxu eleven years (1885), the French invasion army of more than 2,000 people from Vietnam Langshan invasion of Zhennan Pass, patriotic general Feng Zicai rate of soldiers and civilians in the pass 4 kilometers in the pass before the heroic resistance, defeated the French army (Zhennan Pass victory).

In 1907, Sun Yat-sen and Huang Xing launched the Zhennan Pass Uprising to overthrow the Qing Dynasty.

Between 1938 and 1944, Ho Chi Minh carried out revolutionary activities in Guangxi and entered and exited Vietnam through Pingxiang, and after the independence of North Vietnam in 1954, Ho Chi Minh visited Guangxi via Zhennan Pass several times for vacations and birthdays.

During the Anti-Japanese War, the Japanese army invaded Guangxi from Vietnam and burned down the gate.

In 1953, the name was changed to "Mutnam Pass".

After the outbreak of the Vietnam War in 1965, China sent troops to assist North Vietnam in resisting the United States, and Chinese troops and aid materials often entered the territory of Vietnam through this gate. In the same year, "Mu Nan Pass" was renamed "Friendship Pass", and the name of the pass was inscribed by Chen Yi, then Vice Premier and Foreign Minister of China, symbolizing the revolutionary friendship between China*** and Vietnam*** as "comrades and brothers". It symbolizes the revolutionary friendship between China and Vietnam.

Currently, the city has been rebuilt as a three-story granite citadel.