In my experience, a student with an average IQ is admitted to Tsinghua Peking University through hard work, and the probability of this happening is extremely low, which can almost be described as a miracle. Of course, this topic should be clearly stated as the undergraduate course of Tsinghua Peking University, because the undergraduate course is the most difficult in Tsinghua Peking University, while the postgraduate course is relatively easy.

The simplest and most direct way to answer this question is to look at the IQ of the students admitted to Tsinghua Peking University. In fact, except for special enrollment, those who are admitted to Tsinghua Peking University every year are people with unusual IQ. If students' IQ is divided into several grades, then all the students who can be admitted to Tsinghua Peking University are first-rate and second-rate students.

It is not surprising that students with first-rate IQ are admitted to Tsinghua Peking University, but it is also possible for students with second-rate IQ to be admitted to Tsinghua Peking University through hard work. This is not a miracle. At most, it is the result of innate advantages and acquired efforts that are easier to achieve.

However, there is still hope for students with average IQ to get into a better university through hard work, and it is not just a miracle to get into Tsinghua Peking University. Miracles happen occasionally, but the probability is extremely low.

Theoretically, one can break through the innate IQ limit through hard work and experience accumulation, but for every student, the time before the college entrance examination is more than ten years after all. Ten years is not a short time. During this period, people's learning level may change greatly, but it seems impossible to change by leaps and bounds, because qualitative change requires the accumulation of quantity, and the accumulation of quantity takes enough time. Of course, if a student keeps repeating the college entrance examination, he may be admitted to Tsinghua Peking University many years later. This is an extreme situation, which is another matter.

Some people may think of letting students shorten the time of qualitative change of learning level with several times of learning intensity in a limited time. This is just a theoretical idea, which is not realistic at all. People's physical endurance is also limited. High-intensity study will only crush students' health, and the accumulation of knowledge and skills is a gradual process. In the short term, high-intensity learning often reduces the efficiency of knowledge digestion and absorption, but haste makes waste.