win-win cooperation(Analysts believe the annual import and export reports will boost global confidence in the Chinese economy and bolster win-win cooperation with China, speaking volumes for the fact that the world rejects the decoupling theory hyped up by some U.S. politicians.news.cnaldrignedigen)
comity(formal – An association of nations for their mutual benefit.: ‘The comity between Canada and the United States is testimony to the strength of liberal peace.'Bullfinch)