Research on legislation for Chinas national park system Research on financing mechanisms for Chinas national park system Research on overall spatical planning for Chinas national park system Research on governance structures for Chinas national park system Research on the evolution of Chinas open economy system Research on national park system Research on the evolution of tourism destination complex system Research of the legislation of Chinas debt collection industry Research on the perfection of Chinas rural old-age security system Research on evaluation and design strategy of national park guidance system