In the fourth walkability report, NRDC collaborates with Dr. Long Ying's team at Tsinghua University's School of Architecture to evaluate street walkability with a focus on Live-Work-Play Centers (LWP) in 50 Chinese cities. Through a virtual auditing of the built environment based on street view images, the report evaluates the walking conditions of 12,740 streets in 71 LWPs using 9 street indicators such as crossing facilities, sidewalk quality, and number of trees.