Tall man. The hit rate of Zhao Ailin's six sets of papers is as high as 90%, with 20 points for statistical selection, 70 points for cases and a total score of 90 points. Zhao Ailin, first-class constructor, domestic senior constructor trainer, national cost engineer, first-class constructor and registered safety engineer. His lectures are focused and accurate. His main courses are construction project management and construction practice, which is highly praised by students in this subject.