Who discovered painted Neolithic pottery at Yangshao in 1921?

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Map of eastern Asia highlighting the province of Henan in central China in orange, with its capital Zhengzhou labeled. Surrounding countries and major international boundaries are shown, along with a small inset map locating Henan within all of China. — Henan Henan province, China.

The Swedish geologist and archaeologist Johan Gunnar Andersson discovered the Neolithic painted pottery at Yangshao in 1921. His findings at this site in northern Henan province provided the first evidence of Neolithic culture in China and helped define what is now known as the Yangshao culture.12