This is an accompanying exercise book of Chemistry (2nd Edition), a textbook for Chinese government scholarship students, and is suitable for pre-university students who come to China to study chemistry. It includes the summary and organization of the basic knowledge, detailed explanation of the exercises at the back of the book, self-test questions, exercises for chapters and detailed explanation of answers, etc. It makes a comprehensive summary of the important chemical knowledge in the textbook. Based on the foundation and oriented to the test, it helps students build a complete and comprehensive chemical knowledge system, improve their skills to use chemical knowledge, and enhance their understanding when they enter universities to study chemistry.