Research on financing assistance strategy of core enterprises in supply chain 并列题名：Research on financing assistance strategy of core enterprises in supply chain Research on transaction mechanism and service support of platform enterprises in supply chain 并列题名：Research on transaction mechanism and service support of platform enterprises in supply chain Research on financing mode of small and micro enterprises in China Research on co-opetition strategy of construction enterprises in Macau Research on extended warranty service channel strategies in supply chain Research on financing difficulties of small and micro-sized enterprises in China