Core Viewpoint - The first batch of "lunar bricks" used for lunar construction research has successfully returned to Earth after a year-long exposure experiment in space, confirming their good condition [1]. Group 1: Lunar Brick Samples - The returned sample unit R5 consists of 34 "lunar bricks" with a total weight of approximately 100 grams, having endured extreme conditions such as space radiation and significant temperature variations for one year [3]. - These simulated "lunar bricks" were created using materials formulated based on the composition of real lunar soil, employing three forming processes: hot pressing, electromagnetic induction sintering, and microwave sintering. The compressive strength of these bricks is over three times that of ordinary bricks [3]. Group 2: Key Performance Verification - The primary objective of the lunar bricks' space journey was to validate three key performance metrics: mechanical properties, thermal properties, and radiation resistance. During the space experiment, researchers also conducted a series of synchronous experiments on the ground [4].