太空会师！

Group 1 - The article highlights the successful docking of the Shenzhou 21 crew with the Chinese space station, marking the 7th "space reunion" in China's space history [1] - The Shenzhou 21 crew joined the Shenzhou 20 crew in the space station, where they will work together for approximately 5 days [1] - The two crews took a group photo to reassure the public of their safety and well-being [1]