BEIJING, Jan. 29 (Xinhua) -- The following is a summary of published science and technology news of China.

HEARING RESTORE

Using an experimental gene therapy, a team led by Chinese scientists has recovered the hearing of five children born with a genetic defect that had left them profoundly deaf.

In a first-in-human clinical trial, they demonstrated the safety and efficacy of the gene therapy in treating patients with hereditary deafness, which afflicts up to 26 million people worldwide.

CATTLE CLONING

China has successfully cloned both Zhangmu cattle and Apeijiaza cattle, two endangered breeds found in southwest China's Xizang Autonomous Region, scientists announced Monday.

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

ARCHAEOLOGICAL DISCOVERY

Chinese archaeologists have discovered a large group of ancient trench-enclosed tombs dating back to the Warring States Period (475-221 BC) in north China's Inner Mongolia Autonomous Region, local authorities said.

During the excavation work at the ruins of the tomb cluster in Helinger County of Inner Mongolia, a total of 64 tombs and one ash pit were unearthed. Additionally, over 100 pieces of cultural relics including pottery, bronze, iron, jade, stone, agate and pendants were discovered, according to the Inner Mongolia Institute of Cultural Relics and Archaeology. Enditem

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