Rock carvings in the park cover a wide range of subjects that vividly depict the life and sacrificial rituals of people who lived there between 10,000 and 3,000 years ago, says Zhang Jianguo, an expert on rock art and deputy director of the Helan Mountains rock art management bureau.
Altogether, about 6,000 carvings have been found in the park area since the 1970s. And in the Helan Mountains region, more than 25,000 pieces have been discovered.
