An archaeological team conducts an excavation at a construction site of Hunan Dizhi Middle School in central China’s Hunan, May 28, 2021. (China News Service/Yang Huafeng)

An archaeological staff measures the potteries at a tomb dating back to Song Dynasty(960-1127) on a construction site of Hunan Dizhi Middle School in central China’s Hunan, May 28, 2021. (China News Service/Yang Huafeng)

An archaeological staff measures a porcelain from an ancient tomb on a construction site of Hunan Dizhi Middle School in central China’s Hunan, May 28, 2021. (China News Service/Yang Huafeng)

The site of an ancient tomb waiting for excavation is seen on a construction site of Hunan Dizhi Middle School in central China’s Hunan, May 28, 2021. (China News Service/Yang Huafeng)

An archaeological staff presents parts of porcelain from an ancient tomb on a construction site of Hunan Dizhi Middle School in central China’s Hunan, May 28, 2021. (China News Service/Yang Huafeng)

A tomb from Han Dynasty (206 BC-25 AD) is seen on a construction site of Hunan Dizhi Middle School in central China’s Hunan, May 28, 2021. (China News Service/Yang Huafeng)

An ancient tomb group is found on a construction site of Hunan Dizhi Middle School in central China’s Hunan, May 28, 2021. (China News Service/Yang Huafeng)