In this combo photo, the upper part taken by Ren Yongzhao shows primary school students practicing drawing in front of the Potala Palace in the 1950s; and the lower part taken by Chogo on Nov. 10, 2017 shows doctorate holders who were indigenously cultivated in southwest China's Tibet Autonomous Region. 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)
