开源节流

Explanation: Exploitation of water resources, control water flow. Analogy to increase revenue, cut costs. 　　Usage: Joint type; as the predicate attribute, clause; with compliment 　　Source: Xunzi, "Xunzi Fu country": "Fu treasures such persons, goods flow as well. So the Lord will move out of their support and, the flow section, open its source, and when appropriate, Yan, Huang will then make the world more than the previous not have to worry less. " 　　Examples: Work in the economy, should always pay attention to ~. 　　Riddle: Original; water faucet not forget off Thesaurus:  incentive wage abstinence, Onward with New Strengths