This video snap shows one of the cloned calves. (PHOTO / CCTV)

BEIJING — China has successfully cloned both Zhangmu cattle and Apeijiaza cattle, two endangered breeds found in southwest China's Xizang autonomous region, scientists announced Monday.

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Four male calves of each breed were recently born in Yunyang county, southwest China's Chongqing municipality, marking the world's first successful cloning of cattle from Xizang.