Cooperation is * * * co-creation; * * * engaged in the same; Two or more people work together to achieve the same goal; Joint operations or operations. The language "Mandarin Yu Jin San": "The benefits of killing people. One by one, fear of becoming a vassal; To return, the country will be even more embarrassed; After that, the cooperation between the monarch and the minister was afraid that the monarch would worry. If you don't kill it. "