The Conference of the Parties to the Convention on Biological Diversity (CBD) adopted a new global biodiversity strategy—the Kunming-Montreal Global Biodiversity Framework (GBF). This paper provides a systematic review of the international practice of "biodiversity offsets and credits" proposed in the 19th Action Target of the GBF, divided into three implementation steps: (1) scientific quantification of biodiversity credit valuation; (2) policy promotion of biodiversity credit certification; (3) market realization of biodiversity credit transactions. The policy environment and market mechanisms in the United Kingdom (UK), the United States (USA), Australia, and other countries that implemented the Business & Biodiversity Offsetting Program (BBOP) were analyzed to draw successful experiences and lessons learned, providing insights for China on the prospects of applying these practices in national parks to realize the value of ecosystem products better. The main ways of realizing the value of ecosystem products in national parks in China were summarized, followed by the analysis of why the value of biodiversity, as the most prominent ecosystem product in both amount and value, suffers from the "four difficulties", namely, "difficult to measure", "difficult to trade", "difficult to mortgage" and "difficult to encash", two primary causes were discovered: First, there is no such mandatory "No Net Loss" requirement in China compelling developers to mitigate and offset negative biodiversity impact; and second, institutions dedicated to nature reserve conservancy are not entitled with the rights of generating incomes from managing the credits based on increasing biodiversity net gains. It is recommended that China capitalize on the opportunity provided by the preparation of national park legislation to promulgate a biodiversity impact offsetting policy, adopt a biodiversity credit accounting methodology, and pave the way for implementing biodiversity offsets and credits in practice.