I started to give Zhou Meimei, my cousin and Fang Zijing tutorials together. It's not far from their high school entrance exam. Now in late April, and in late June, they have exams. In fact, the time is really tight. It is impossible for them to become top students in remedial courses, because their foundation is relatively poor, but it is still possible to raise their scores to a medium and not too ugly level.

Just like what teachers often talk about, half of the questions are basically sub-questions. If we apply the main formulas, we can solve half of the questions in mathematics, physics and chemistry. And although Zhou...