In the chapter of the thesis, Principal Yuan ruled out the possibility that Old Li and Xiao Zhou stole the meteorite, as they did not have the opportunity to access the display cabinet. Mai Jie proposed that if security guards Xiao Zhao and Xiao Yang lie, they may delete surveillance footage to cover up their criminal behavior, but security guards do not have the authority to delete video data from the server, and the deletion will leave obvious traces. Principal Yuan introduced the background of KB503 meteorite, which was gifted to H University by Mr. Duanmu to express gratitude to his alma mater and hope that meteorite collection and research can return to rationality. Professor Duanmu denied reports from foreign media that he violated the contract and stated that meteorites are important research objects. Pi Xiaodong speculates that research institutions in M country may take extreme actions due to their inability to persuade Professor Duanmu to retrieve the meteorite. Ma Yong reported the situation of AAA company, Hong Bin is missing, his apartment is being searched, and Mai Jie instructed to find Hong Bin.