People view exhibits at a museum of Chengjiang Fossil site in Chengjiang County, southwest China's Yunnan Province, Oct. 14, 2021. Located in Chengjiang County in southwest China's Yunnan Province, the Chengjiang Fossil site presents the most complete record of an early Cambrian marine community. The Chengjiang Fossil was included into the World Heritage List in 2012. (Xinhua/Chen Xinbo)

People view exhibits at a museum of Chengjiang Fossil site in Chengjiang County, southwest China's Yunnan Province, Oct. 14, 2021. Located in Chengjiang County in southwest China's Yunnan Province, the Chengjiang Fossil site presents the most complete record of an early Cambrian marine community. The Chengjiang Fossil was included into the World Heritage List in 2012. (Xinhua/Chen Xinbo)

People view exhibits at a museum of Chengjiang Fossil site in Chengjiang County, southwest China's Yunnan Province, Oct. 14, 2021. Located in Chengjiang County in southwest China's Yunnan Province, the Chengjiang Fossil site presents the most complete record of an early Cambrian marine community. The Chengjiang Fossil was included into the World Heritage List in 2012. (Xinhua/Chen Xinbo)

Aerial photo taken on Oct. 13, 2021 shows a museum of Chengjiang Fossil site in Chengjiang County, southwest China's Yunnan Province. Located in Chengjiang County in southwest China's Yunnan Province, the Chengjiang Fossil site presents the most complete record of an early Cambrian marine community. The Chengjiang Fossil was included into the World Heritage List in 2012. (Xinhua/Chen Xinbo)

People view exhibits at a museum of Chengjiang Fossil site in Chengjiang County, southwest China's Yunnan Province, Oct. 13, 2021. Located in Chengjiang County in southwest China's Yunnan Province, the Chengjiang Fossil site presents the most complete record of an early Cambrian marine community. The Chengjiang Fossil was included into the World Heritage List in 2012. (Xinhua/Chen Xinbo)

A man takes photos of exhibits at a museum of Chengjiang Fossil site in Chengjiang County, southwest China's Yunnan Province, Oct. 13, 2021. Located in Chengjiang County in southwest China's Yunnan Province, the Chengjiang Fossil site presents the most complete record of an early Cambrian marine community. The Chengjiang Fossil was included into the World Heritage List in 2012. (Xinhua/Chen Xinbo)

来源：Xinhua