Xinhua News Agency, June 4, the fourth batch of space science experimental samples from the Chinese space station returned smoothly and delivered to experimental scientists. This morning, the fourth batch of space science experimental samples from the Chinese space station returned to the ground with the return module of the Shenzhou 15 spacecraft and delivered the space application system led by the Chinese Academy of Sciences at the Dongfeng landing site. At about 14:00 on the 4th, some of the experimental samples were delivered to the Space Application Engineering and Technology Center of the Chinese Academy of Sciences in Beijing, and the overall space application system and relevant laboratory personnel checked and confirmed the basic state of the returned experimental samples, and handed over the relevant experimental scientists to carry out follow-up research. The space application system goes down with the experimental samples of 15 scientific projects in the re-entry module of Shenzhou 15 spacecraft, including life experimental samples such as cells, nematodes, Arabidopsis, ratooning rice, etc., as well as experimental samples of many kinds of alloy materials, new infrared detector materials, amorphous film materials and so on. The total weight of the downward experimental sample is more than 20 kg.