Mathematics textbook. By understanding the content of parallel mathematics textbook in Zhengzhou, we know that this textbook is a series of mathematics textbooks published by Zhengzhou Education Publishing House, which pays attention to the cultivation of mathematical thinking and helps students better master mathematical knowledge and problem-solving skills through typical examples, teacher guidance and thinking. Zhengzhou, referred to as "Zheng" for short, was called "in heaven and earth" in history, called Shangdu in ancient times, and now called Greentown. Henan Province governs prefecture-level cities, provincial capitals and megacities.