Real estate belongs to the secondary industry. The secondary industry is industry and construction, and real estate belongs to construction. Real estate is a comprehensive and complicated concept. Physically, it is composed of buildings and land. Land can be divided into undeveloped land and developed land. Buildings are attached to and combined with the land. Building refers to the product of artificial construction, including houses and structures.

If it is a commercial house in real estate, that is, the construction industry, it belongs to the secondary industry. If it involves services, such as housing sales, property management, publicity, etc. It is more commercialized and can be regarded as the tertiary industry.

Real estate is a combination of real estate and real estate. Real estate refers to all kinds of houses built on land, including houses, warehouses, factories, businesses, services, culture, education, office medical care and sports rooms. Real estate includes land and underground infrastructure, such as underground pipelines and ground roads such as heating, water supply, power supply, gas supply, drainage and sewage.

Real estate refers to land, buildings, inseparable parts fixed on land and buildings and various rights and interests attached to them. Real estate is also called real estate in economics because of its own characteristics, that is, the fixed position and immovability.