Teacher Li Saibei is a math teacher and head teacher in Dandong No.13 Middle School.

The winner of the grand prize of the 4th Ginkgo Cup Competition in Dandong City has won many high-quality courses in Northeast China, provinces and cities. In this lecture, Mr. Li Saibei explained "Examination Instructions" to the students at the scene in a simple way, analyzed the composition of the math test paper for the students from a macro perspective, and formulated review strategies for the students.

Dandong No.13 Middle School is located by the beautiful Yalu River, with a beautiful and clean campus and good mental outlook of teachers and students, which is a beautiful scenery in binjiang road.