Zhang Yu 18 lectures often spend 5.6 hours doing 6.7 examples (equivalent to 5 pages) every day. 1000 lectures are not difficult, while Zhang Yu 1000 lectures and simulation questions are difficult. 30 years of postgraduate entrance examination is not so difficult.

Combining the videos of Zhang Yu and Gao Kunlun, it is much easier to learn. Zhang Yu talks about learning methods and ideas, and Gao Kunlun explains topic skills, combining the two.