Li Yongle, Li Lin. Lin li, female, was born in Beijing. She is a physicist. 195 1 was elected as an academician of China Academy of Sciences and received a doctorate from Cambridge University. Li Yongle, male, 1983, was born in Jilin City, Jilin Province. She is a high school math physics teacher, the exclusive creator of watermelon video, and a double bachelor of physics and economics in Peking University. 660 and 880 are the problems of Li Yongle and Li Lin respectively.