Combo photo shows a view of Lhasa Middle School in Lhasa, southwest China's Tibet Autonomous Region in the 1950s (up, taken by Jing Jiadong) and on Aug. 9, 2021(bottom, taken by Sun Ruibo) respectively. 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)
