It's good. Feng Zhigang Senior High School Mathematics Competition Guidance is an excellent mathematics competition guidance book, which is suitable for students of senior high school mathematics competition. This book is characterized by in-depth explanation, clear thinking and moderate difficulty, covering all aspects of high school mathematics competitions, including mathematical analysis, number theory, algebra, geometry and so on. In addition, the book also provides a large number of examples and exercises, which can help students better master the problem-solving skills and methods of mathematics competitions. In short, if you are preparing for a high school math contest, this book is a very good choice.