There are indeed many errors in the association’s reference books
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It can only be said that this is a guidebook that explains how to solve problems, but it does not guarantee correctness; I’ll buy a book from Tian Da after the New Year. It’s difficult to evaluate this association’s products – they’re of poor quality, with many negative reviews.
For the books published by the association, I personally recommend reading those on chemical reaction engineering (I think it’s better than the books from Tianjin University; those are too complex, and the exams related to them aren’t that difficult), as well as the chapters on the design of chemical and process systems. Study the other *question sets carefully. But it's sufficient to be familiar with the guidelines.