On August 20, 2021 Chinese cosmonauts Nie Haisheng and Liu Boming performed the spacewalk to install a coolant pump and to lift a panoramic camera on the exterior of the complex. The EVA lasted 5 hours and 55 minutes. It was the 3^rd spacewalk for Liu Boming and the 1^st spacewalk for Nie Haisheng. The spacewalk was the third extravehicular activity in the history of China’s space program.