A piece of ancient Mayan art collection at the exhibition in Chengdu, Southwest China's Sichuan province. [Photo provided to chinadaily.com.cn]

"We were restless in 2012 but knew little about Maya," said Hao Ding, a young visitor to the museum.

It is the Mayan calendar that made this world-famous prediction. The Mayan civilization, which originated in the rain forest and suddenly disappeared, left many mysteries.