In this combo photo, the upper part taken by Zhaduen in 1998 shows a panorama view of Xigaze of southwest China's Tibet Autonomous Region; the lower part is an aerial photo taken by Zhang Zhenqi on July 12, 2019 showing a view of a district of Xigaze City. 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)
