Jiaojia relics in Jinan, Shandong province -- Dawenkou culture, about 5,000 years ago. [Photo provided to China Daily]

Archaeologists measured 5,000-year-old bones unearthed in graves at a ruins site at Jiaojia village in the Zhangqiu district of Jinan, capital of East China's Shandong province.

They identified some unusually tall and strong people, with at least one man having reached 1.9 meters in height.