Photo shows an earthenware bowl in Yangshao Culture Museum in Yangshao Village, Mianchi County, central China's Henan Province, April 10, 2020. Yangshao Culture Museum displays prehistoric culture exhibits. [Photo/Xinhua]

Photo shows a piece of cultural relic in Yangshao Culture Museum in Yangshao Village, Mianchi County, central China's Henan Province, April 10, 2020. Yangshao Culture Museum displays prehistoric culture exhibits. [Photo/Xinhua]

Photo shows a piece of cultural relic in Yangshao Culture Museum in Yangshao Village, Mianchi County, central China's Henan Province, April 10, 2020. Yangshao Culture Museum displays prehistoric culture exhibits. [Photo/Xinhua]

Photo shows a piece of cultural relic in Yangshao Culture Museum in Yangshao Village, Mianchi County, central China's Henan Province, April 10, 2020. Yangshao Culture Museum displays prehistoric culture exhibits. [Photo/Xinhua]

Photo shows a piece of cultural relic in Yangshao Culture Museum in Yangshao Village, Mianchi County, central China's Henan Province, April 10, 2020. Yangshao Culture Museum displays prehistoric culture exhibits. [Photo/Xinhua]