 We developed a protocol to generate high-resolution urban land use maps in China using satellite imagery and open social data. Our method identified land use types with an overall accuracy of 81%, which was higher than the government's official land use map. This protocol can be applied to other cities in China and beyond to provide detailed information on urban land use patterns. This article was authored by Ting Yun Hu, Jun Yong, Xu Weizhou Li, and others.