Liu Lei: Senior economist, leader in management majors, with many years of experience in high-level corporate management, rich practical experience in management, and the textbooks he writes are extremely practical. His books include: "Principles of Management", "Modern Enterprise Management", "E-Commerce Logistics", "Social Security", "Introduction to Logistics", "Introduction to Economic Law", "Entrepreneurship Management", etc. Teacher Liu is an expert in technological innovation and holds 35 patents (including 17 invention patents and 18 utility model patents).