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Top1. Introduction
With the continuous increase of the global elderly population, elderly care services have increasingly become the focus of social attention, and this trend will be more obvious in the next few decades. The aging of China's population is accelerating. At the end of 2020, the number of people over 60 in China was 264.02 million, accounting for about 18.7% of the total population, which is about 10.14 million more than that at the end of 2019. In 2020, The number of people over 60 in China was 168 million, accounting for 23.24% of the world. The housekeeping services for the elderly, the medical rehabilitation for the elderly, the machinery supplies for the elderly, the daily necessities for the elderly, the cultural and spiritual comfort for the elderly, the finance and real estate for the elderly and other related industry systems, are becoming more and more perfect to meet the living and consumption needs of the huge group of elderly people, which has become a new growth point of China's regional economy (An et al., 2019). The elderly care service industry includes various institutions, such as elderly care institutions, suppliers of upstream and downstream, and elderly care service providers. The elderly care service industry has formed a service chain with a clear structure and an explicit subject (Zhao, 2021; Gao & Zhou, 2020). The current development of enterprises is inseparable from the competition and cooperation of upstream and downstream enterprises. The production and operation, service implementation, procurement and after-sales of any elderly care service organization are all in the ecological chain and supply chain network structure of elderly care services. The supply chain that integrates elderly care service resources can effectively achieve resource complementarity, efficiently improve service satisfaction, and greatly weaken the bullwhip effect in the elderly care service supply chain (Gao & Zhou, 2020). Community-based elderly care services, institutional elderly care services, and home-based elderly care services are the three most important elderly care service models in China. However, no matter which elderly care service model it is, it is inseparable from the cooperation between upstream and downstream enterprises in the supply chain. The service quality of elderly care service providers and upstream and downstream enterprises will affect the service experience and satisfaction of customers. Supply chain innovation has become all the more important in today's competitive world (Mandal, 2016), and from the perspective of supply chain, the elderly care service industry should pay attention to the construction of upstream and downstream partner network. Understanding and researching the elderly care industry based on the SCOR model of the supply chain is the inevitable development trend of competition and cooperation in the ecological chain and industry chain of elderly care services under the current complex ecosystem. In terms of the quality of elderly care services, not only should the basic service quality of elderly care service providers be paid attention to, but also the service quality needs to be examined from the perspective of the supply chain system, and the factors affecting service quality need to be analyzed and studied, so as to provide reference for improving the overall efficiency and service satisfaction of the supply chain.