DALI, Yunnan -- More than 2,000 wooden poles recently unearthed at a site in Jianchuan county, have been found to be more than 3,000 years old.

The poles, still standing, were dug 4.5 m into the ground.

Archaeologists said carbon tests showed the poles were from the Neolithic age, and were probably the foundations for a structure built by a community that existed at the time in southwest China.