There are usually perfect property management services, including 24-hour maintenance, repair and security services, which belong to () office buildings.

The knowledge point of this exam is the classification of office buildings. There is no uniform classification standard for office buildings in China, and professionals mainly classify them according to their location, architectural design and decoration, and profitability. Abroad, office buildings are usually divided into three grades: A, B and C. A-class office buildings have superior geographical location and traffic environment, excellent physical conditions of buildings, building quality meeting or exceeding the requirements of relevant building regulations or codes, and their profitability can be comparable to that of new office buildings. Grade A office buildings usually have comprehensive property management services, including 24-hour maintenance, repair and security services.