He and his team began work at around 8 a.m. on the day the picture was taken. They were tasked with an astounding 10 surgeries that day, and they got right to work, successfully completing seven consecutive procedures in a row.
They eventually stopped at around 5 p.m. as they were preparing for the eighth operation. Spying his opportunity for a break, Yu chose the operating theater floor as the perfect spot for a quick 10 minute break that accidentally turned into a 10 minute nap, one which his colleague snapped a picture of.