Tibetannet

In this combo photo, the upper part taken by Wang Chunde in the 1950s and the lower part taken by Chogo on Aug. 13, 2021 shows views of Barkhor Street in Lhasa, 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)

In this combo photo, the left part taken by Tudain shows Lhazhoen, a businesswoman, talking to a client though a mobile phone in 1994; and the right part taken by Jigme Dorje on June 25, 2021 shows a passenger taking a selfie with a Fuxing bullet train on the Lhasa-Nyingchi railway, 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)

In this combo photo, the upper part taken by Wang Chunde in the 1950s and the lower part taken by Sun Fei on Aug. 9, 2021 shows views of the Lhasa Bridge, 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)

In this combo photo, the upper part taken by Ren Yongzhao shows vehicles running on a suburban road toward the Potala Palace in the 1950s, and the lower part taken by Zhang Rufeng shows vehicles running on a street toward the Potala Palace on Aug. 9, 2021 in Lhasa, 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)

In this combo photo, the upper part provided by the Tibet Daily in the 1980s and the lower part taken by Jigme Dorje on Aug. 9, 2021 shows views of a market in Lhasa, 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)

In this combo photo, the upper part taken by Cheng Xi shows children riding on a merry-go-round at a kindergarten in Xigaze in the 1980s; and the lower part taken by Zhang Rufeng on Aug. 9, 2021 shows a view of an amusement park in Lhasa, 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)

In this combo photo, the left part taken by Basang shows a herdsman learning to ride a bicycle in Nyainrong County in 1980s; and the right part taken by Chogo on Feb. 23, 2017 shows a youngster posing with a motorcycle in Nyainrong County, Nagqu, 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)

In this combo photo, the upper part taken by Lan Zhigui in the 1960s and the lower part taken by Purbu Zhaxi on Aug. 9, 2021 shows views of the west suburbs of Lhasa, 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)

In this combo photo, the upper part taken by Ren Yongzhao shows residents buying tea kettles in Lhasa in the 1950s; and the lower part taken by Purbu Zhaxi on Dec. 12, 2011 shows a villager using a blender to make butter tea for her family in Xigaze, 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)

In this combo photo, the upper part taken by Ren Yongzhao shows patients walking to the doctors' offices at Lhasa People's Hospital in the 1950s; and the lower part taken by Sun Ruibo on April 19, 2021 shows surgeons of Lhasa People's Hospital using a robot to perform an orthopaedic surgery under the remote guidance of experts from Beijing Jishuitan Hospital through 5G communication technology in Lhasa, 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)