The book Standard Course HSK 1-4 is a comprehensive guide for learners preparing for the HSK (Hanyu Shuiping Kaoshi) levels 1 to 4. It covers essential vocabulary, grammar, and language skills required for these levels, with structured lessons, practice exercises, and mock tests. Designed to build proficiency in Mandarin Chinese, it caters to beginners and intermediate learners aiming to enhance their language skills systematically.