There are some secrets of China's terra-cotta army that are baked in the clay

China's famous clay sculptures are giving up their secrets. 50 years after they were discovered, the terracotta warriors are giving their secrets to the public. The sculptures were found in China's first major city, Guangzhou, in China, in the early 1950s and 1960s.

Specialized production system lay behind the famous terra-cotta troops found in ancient Chinese emperor’s tomb.