On April 15, 2023 Chinese cosmonauts Fei Junlong and Zhang Lu performed the spacewalk to install the second additional pump block of the thermal control system and to attach the second external platform to the “Mengtian” module of the “Tiangong” Station. The EVA lasted about 7 hours and 30 minutes. It was the 4^th EVA for both Fei Junlong and Zhang Lu. It was the 12^th EVA of Chinese space program.