What are the definition and characteristics of engineering supervision enterprises?

Engineering supervision enterprises refer to economic organizations that engage in engineering supervision business and obtain the qualification certificate of engineering supervision enterprises? Is it the practice organization of supervision engineer? The engineering supervision enterprises in China have the following characteristics:

(1) must be a social and economic organization established in accordance with the Company Law of People's Republic of China (PRC)?

(2) It must be an independent enterprise legal person for profit?

(3) Self-raised funds