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This study investigates the spatiotemporal evolution of the efficiency of medical public–private partnerships (PPPs) and the decoupling of environmental pollution to promote public health, balanced development, and environmentalism. Based on the 2011–2020 data of medical PPPs in China, the results of a three-stage data envelopment analysis (DEA) and decoupling model show that, firstly, the spatiotemporal evolution of PPP efficiency of China in healthcare has forward periodic twists and turns, and alternating peaks and valleys, which fall into two stages: extensive development, and transformation and upgrading. Secondly, this development is either a type of stable, steady or a surge increase. Thirdly, PPP efficiency and environmental pollution show a weak decoupling state. That is, Northeast China (NEC) and Southwest China (SWC) are in a state of increasing connection, whereas Northwest China (NWC) is in an expanding negative decoupling state. The remaining regions are in a weak decoupling state. This study recommends the mode of ecology-oriented development (EOD) to promote a high-quality, integrated development of PPPs in medicine and healthcare that are especially conducive to a “green economy.” There should be a more coordinated development across regions in China as well.

The safety of agricultural products has become increasingly prominent, but the participants in the supply chain of agricultural products are in a dilemma lacking of motivation in the construction of the traceability system. This paper summarizes the definition and origin of the tracing motivation, and analyzes the main motivation based on information sharing demand and product differentiation demand. Accordingly, it builds agricultural traceability system and designs process, then evaluate the application effect of the system. The traceability system of agricultural products is the concrete realization of food safety traceability system, which is of great significance to food safety management.

Research shows that P2P technology exist many problems about reliability in the Internet credit industry. It has become particularly important to ensure the reliability of users and improve the success rate of transactions. In this paper, the traditional trust identification model is improved, and the P2P business transaction is integrated into the credit identification model as a dynamic indicator. -On this basis, a block chain is constructed with credit recognition model as intelligent contract. Through the block chain network based on the credit identification model, the credit value of each user will be dynamically evaluated. The block chain network will ensure the credibility of the dynamic indicators of transactions, so as to ensure the reliability of the customer credit value evaluation. Therefore, a quantitative standard that both parties can trust can be established. Without the guarantee of the third party, both sides of P2P transaction can define the trustworthiness of the transaction parties. That guarantees the reliability of the transaction.