Combination photo shows smiling faces of local people from different ethnic groups in Qamdo City, southwest China's Tibet Autonomous Region. This year marks the 70th anniversary of the liberation of Qamdo. [Photo/Xinhua]

Aerial photo taken on Sept. 18, 2020 shows the buildings of a resettlement site at Dengqen County in Qamdo City, southwest China's Tibet Autonomous Region. This year marks the 70th anniversary of the liberation of Qamdo. [Photo/Xinhua]

Photo taken on Sept. 27, 2020 shows the scenery of a meadow at Lhorong County in Qamdo City, southwest China's Tibet Autonomous Region. This year marks the 70th anniversary of the liberation of Qamdo. [Photo/Xinhua]

Aerial photo taken on Sept. 10, 2020 shows glaciers at Ra'og Township of Baxoi County in Qamdo City, southwest China's Tibet Autonomous Region. This year marks the 70th anniversary of the liberation of Qamdo. [Photo/Xinhua]

Aerial photo taken on Sept. 17, 2020 shows a view of the joint area of Zaqu River and Ngomqu River in Qamdo City, southwest China's Tibet Autonomous Region. This year marks the 70th anniversary of the liberation of Qamdo. [Photo/Xinhua]

Aerial photo taken on Sept. 28, 2020 shows the scenery of a wetland at Lhato Township of Konjo County in Qamdo City, southwest China's Tibet Autonomous Region. This year marks the 70th anniversary of the liberation of Qamdo. [Photo/Xinhua]

Photo taken on Sept. 21, 2020 shows the renovated buildings at a village of Zongang County in Qamdo City, southwest China's Tibet Autonomous Region. This year marks the 70th anniversary of the liberation of Qamdo. [Photo/Xinhua]

Aerial photo taken on Sept. 19, 2020 shows a buddhist temple at Dengqen County in Qamdo City, southwest China's Tibet Autonomous Region. This year marks the 70th anniversary of the liberation of Qamdo. [Photo/Xinhua]

Aerial photo taken on Sept. 28, 2020 shows a planting base in Qamdo City, southwest China's Tibet Autonomous Region. This year marks the 70th anniversary of the liberation of Qamdo. [Photo/Xinhua]