Now I am a teacher of excellent courses. Guo Huanan, male, was born in 1982. In 2000, he graduated from the Science Experimental Class of the Middle School Attached to Beijing People's Congress, in 2004, he graduated from Peking University Institute of Mathematical Sciences, and in 2007, he graduated from eecs. By 2022, 10, 18 had been the teacher of Youdao excellent course. The excellent course "Youdao" is really a conscientious course. On the one hand, it teaches students some knowledge to a certain extent, on the other hand, it will effectively solve problems for them.