In pics: development of Tibet for 70 years

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.

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.  (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.

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.

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.

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.

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.

Combo photo shows a view of Beijing Middle Road in Lhasa, southwest China's Tibet Autonomous Region in the 1980s (up, taken by Che Gang) and on Aug. 9, 2021(bottom, taken by Jigme Dorje) respectively.

Combo photo shows mountaineering team members walking on a snow slope at an altitude of over 7,000 meters in 1960 (up, file photo) and the equipment of Chinese surveyors on Mount Qomolangma, May 21, 2020 (bottom, photo taken by Lhagba).