雷军说明了，凌晨五点半，武汉大学樱花树下拍摄，主要怕人太多

Core Points - Lei Jun, the founder of Xiaomi, visited Wuhan University early in the morning to film promotional content for the new Xiaomi SU7 Ultra and YU7 models during the cherry blossom season [1][3] - The visit attracted attention from the university community, as it coincided with a peak time for alumni returning to the campus to enjoy the cherry blossoms [3] - Lei Jun's commitment to Wuhan University is evident through his significant donations and the establishment of the "Lei Jun Excellence Scholarship" [1][4] Group 1 - Lei Jun filmed promotional videos for Xiaomi's new car models, SU7 Ultra and YU7, at Wuhan University during the cherry blossom season [1][3] - The cherry blossom season is a popular time for alumni visits, leading to high foot traffic on campus, prompting Lei Jun to arrive early to avoid crowds [3] - The design of the new Xiaomi car models is expected to be appealing, reflecting lessons learned from previous product designs [4] Group 2 - Lei Jun hosted notable tech leaders, including Samsung's Lee Jae-Yong and Qualcomm's Cristiano Amon, at Xiaomi's headquarters shortly before his visit to Wuhan [4] - He awarded ten students with the "Lei Jun Excellence Scholarship," totaling 1 million yuan, and emphasized the importance of the Lei Jun class initiative [4]