Research on operation strategies of dual-channel supply chain 并列题名：Research on operation strategies of dual-channel supply chain Research on decision making in dual-channel supply chain 并列题名：Research on decision making in dual-channel supply chain Research on decisions and coordination with contracts in dual-channel supply chain Collaboration and coordination of dual-channel supply chain Optimization and coordination of dual-channel supply chain 并列题名：Research on decisions and coordination with contracts in dual-channel supply chain Optimization and coordination of dual-channel supply chain. research on exploration strategy of China contemporary films