Xiaoyu, engineer, director of Hejin Yuan Meng Training Ltd., contracted author and lecturer of Leetcode. Graduate student of East China Normal University in 2023. Holds 1 invention patent and 65 trademarks.In my freshman year, I founded China's first barrage website with audio-visual qualifications and independent servers. I own 13 Github open source projects received 690 Stars. So far, I have cooperated with Shanghai Xinjing Automation Equipment Co., Ltd. for 5 years and Guangdong Yibei Intelligent Technology Co., Ltd. for 1 year. Joined the Communist Party of China for 11 years, kind, practical, reliable, and the ultimate altruist. Like to study algorithms and business models, respect the universe and human nature, work hard.