The virtual display of products in e-commerce brings new problems of information asymmetry, and the overload of digital information also increases the difficulty of consumers' purchasing decisions. The real-time interaction between the streamer and the consumer during live streaming e-commerce will promote consumers' understanding of the product, reduce information asymmetry, and increase consumers' purchase intention. However, why do people trust the untouchable and unfamiliar streamers from live streaming e-commerce to purchase online? To understand this phenomenon, based on the perspective of the information asymmetry theory and parasocial relationship theory, this research identified how social capital affected purchase intention in live streaming e-commerce. Through a questionnaire survey of live viewers, the purchase intention model constructed by empirical testing was used. The findings showed that the streamer's professionalism, the reciprocal expectation of live streaming, and the viewer's parasocial relationship could effectively increase the viewer's purchase intention. The occurrence of a streamer's negative public events could significantly reduce the viewer's purchase intention. The scale of live streaming and the streamer's commitment had no significant impact on the viewer's purchase intention. Trust played an intermediary role between the streamer's professionalism and parasocial relationship and the viewer's purchase intention.

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The so-called “green” product is a relative concept. Because artificial products will more or less consume resources and energy and affect the environment. If a product can be thought of in the “earth way” at the beginning of design, including products and services, it has a lower impact on the environment than the traditional method in the past to achieve the goal of sustainable use. Be green products and the modular design in the green product design method, in addition to extending the life of parts, if its main parts can have a longer life, other components can be modularized according to their average life. Make the parts in each module have the same life, make the best use of them when replacing, and can replace and repair some parts after damage, reduce waste of resources and cost, and achieve the purpose of green design. This study only discusses the modular design for the environment, and discusses the feasible design schemes of its modular design from the green assembly and disassembly methods in its modular design, and then builds the green modular design assembly with case studies and disassembly design principles, and a set of green design assembly and disassembly evaluation benchmarks. According to this method, the best green modularization feasible design scheme of this case is designed.

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