CPA Independent Audit Norm put forward the multi relationship of merging net profit equal or less than the net profit of parent company.

Dynamic collusions among, and static market power abuse by, generation companies are two major manifestations of such a market, and they could threaten the competitiveness as well as reduce the operating efficiency of the market.

The main economic causes of poor coal mine production safety are insufficient input costs,"the collusion between bureaucrats and coal businessmen",production beyond its production ability,failure of supervision responsibility,serious power-money trade,etc.