Designated a national 4A tourist site in 2012, the valley's infrastructure was upgraded in 2018 with a 15 km elevated wooden boardwalk to protect fragile wetlands. A 2021 policy caps daily visitors at 2,000 to prevent ecological disruption. The valley also hosts the
Qionglin Sky Burial Site, a protected cultural monument, though access is restricted to respect local customs. Since 2020, solar-powered waste processing stations and real-time air quality monitors have been installed, reducing plastic waste by 85%. Military-administered zones along the disputed border limit tourism to the eastern third of the valley. Entry permits are mandatory, obtainable via Nyingchi's digital tourism platform. == References ==