The Chinese turn everything into fee-charging tourist attraction. RMB 50 to visit this historic strategic pass. Ancient invasion route and battlesite between the Chinese and Vietnamese and between the Chinese and the French. We visited the exhibition halls on the Sino-French wars - none on SIno-Vietnamese wars but yes, a photo of smiling Ho Chi Minh at the pass - and also visited the Qing fort overlooking the pass. People still cross the border. Evidence of alot of border trade. Modern-day fortification and watch post on the mountain top.