Core Viewpoint - The Shenzhou-20 manned mission is set to launch on April 24, 2023, at 17:17 Beijing time, with a crew of three astronauts, including Chen Dong as the commander, marking significant progress in China's manned spaceflight capabilities [1][2]. Group 1: Manned Spaceflight Progress - The Shenzhou-20 crew consists of two pilots and one flight engineer, with Chen Dong becoming the first astronaut from the second batch to fly three times, while Chen Zhongrui and Wang Jie are set for their first flights [2]. - China has successfully conducted 20 extravehicular activities (EVA), demonstrating advanced technology and capabilities in this area, reaching an international advanced level [2]. Group 2: Lunar Mission Developments - The development of China's manned lunar mission is progressing smoothly, with the Long March 10 and Dream Chaser spacecraft undergoing initial testing as planned [2]. - Major tests for the lunar mission, including the Long March 10 electrical system matching test and the Dream Chaser's first high-altitude drop test, have been completed [2]. Group 3: Extravehicular Activity Achievements - Key technologies verified during EVAs include spacesuits, airlock operations, robotic arm assistance, and ground support for extravehicular activities [3]. - Successful assembly tasks were completed outside the space station, including the installation of external pump groups and support rods, achieving the complete design functionality of the space station [3]. - The first extravehicular maintenance was conducted to repair damage to the solar wing cables caused by space debris, restoring power generation capabilities [3]. - Proactive measures for space debris protection have been implemented, enhancing the space station's ability to respond to debris threats through multiple inspections and installations of protective devices [3].