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The continuous development of domestic environmental protection industry has forced the springing-up of multiform project financing. In the past decade, BOT, BOO, TOT, etc have always been the main stream modes of environmental protection projects. In recent years, PPP (Public-Private-Partnership) mode, namely the cooperation mode between the public government sectors and private enterprises, has gradually been adopted on more occasions to make up for the shortcomings of BOT mode and some other modes. PPP mode is an optimized project financing and implementation mode, developed from the public infrastructure construction. PPP is a modern financing mode, the cooperation idea of which is to reach "win-win" or "multi-win" of each participant.

Thanks to the capital market, STC has taken an active part in the investment, financing, construction and operation of various environmental protection services. STC always dedicates itself to providing its clients and the public with professional environmental services.