Dai Yu fell asleep on the floor. At 17:00, after seven consecutive operations at Longgang Central Hospital in Shenzhen, the orthopedic surgeon took advantage of a break while the anesthesiologist prepared the next patient. A colleague took the photo; Yu had started operating at 8:00.

As deputy director of the Department of Orthopedics, Dai was part of a team with ten surgeries scheduled for that day. During the break, he sat down for ten minutes. The image spread widely online, and users praised the doctor.
But when his colleague captured the scene, seven of the ten operations had already been performed, and three were still on the schedule.
