Core Viewpoint - The Shenzhou-20 crew successfully conducted their first extravehicular activity (EVA) from the node module of the Chinese space station on May 22, marking the 20th EVA in the station's history since the last one on December 26, 2021 [1][3]. Group 1: EVA Details - The Shenzhou-20 crew began their work early in the morning at around 2 AM, requiring them to close three hatches and perform airtight checks before exiting [3]. - The node module's exit hatch is 15 centimeters smaller in diameter compared to the hatch of the Wentian airlock module, adding to the complexity of the EVA [3][5]. Group 2: Reasons for Node Module EVA - The node module serves as a backup airlock for the Wentian module, necessitating its periodic activation to ensure functionality [5]. - The EVA involved installing four protective devices at different locations on the space station, which required a more efficient exit from the centrally located node module [5]. Group 3: Achievements - Astronaut Chen Dong became the first astronaut to complete EVAs from both the Wentian airlock and the Tianhe node module, showcasing the versatility and capability of the crew [5].