Aerial photo taken on May 10, 2020 shows glacier near the advance camp at an altitude of 6,500 meters on Mount Qomolangma. On May 23, 1951, the Agreement of the Central People's Government and the Local Government of Tibet on Measures for the Peaceful Liberation of Tibet (17-Article Agreement) was signed, officially proclaiming the peaceful liberation of Tibet. The year 2021 marks the 70th anniversary of the historic event. (Xinhua/Sun Fei)
