China University of Geo-sciences faculty at work in 1959

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A great documentary: The Foolish Old Man Removes the Mountains, 1971-1975

  https://www.youtube.com/watch?v=6McbfQeIsC4   https://www.youtube.com/watch?v=dC22jQ6tm2g https://www.youtube.com/watch?v=dA5wKZeaV5A   https://www.youtube.com/watch?v=x-CwaFmGVLs   https://www.youtube.com/watch?v=jLY9zxF3VoQ   https://www.youtube.com/watch?v=DkGpHwrKcoE https://www.youtube.com/watch?v=JUJ4_GmmDOE   https://www.youtube.com/watch?v=Y3t6AU-B2oU   https://www.youtube.com/watch?v=Z4tebFU9cxo https://www.youtube.com/watch?v=_7PKVGhUHeo https://www.youtube.com/watch?v=fRfptRRTR5U https://www.youtube.com/watch?v=aRgEE3Yfa7E      

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