Education investment, training investment, labor mobility investment and so on. Human capital investment refers to a country's investment in education funds and technical training for economic development. The main forms are education investment, training investment, labor mobility investment, health care investment and "learning by doing" investment, aiming at obtaining value-added labor output and income increase or other benefits in the future through investment in human capital. Human capital is a concept of western economics, also known as "intangible capital". Compared with "material capital", it is the capital embodied in workers, such as their knowledge and skills, cultural and technical level, health status and so on. Its main feature is that it is linked to personal freedom and does not transfer with the sale of products.