## 1 Introduction  
Electronic waste has significant value in recycling and remanufacturing, while causing environmental pollution. For example, the International Telecommunications Union (ITU) studies show that electronic waste generated in 2016 contained 55 billionworth of recyclable raw materials [1]. Among them, the most common way to reuse is to remanufacture used products as remanufactured products or refurbished products in the market to obtain the residual value of the products. After the recycling and remanufacture of electronic waste, remanufactured products and refurbished products save 70% of materials compared with new products, save energy by 60%, save costs by 50% and reduce pollutants by more than 80% [2]. While increasing corporate profits, the environmental hazards of electronic waste are greatly reduced. Currently, well-known manufacturers and retail companies such as Kodak, Hewlett-Packard, Wal-Mart and Apple have successfully implemented closed-loop supply chain management and obtained huge commercial profits for their respective companies. Product remanufacture is a process in which waste electronic products are used as raw material for production, and specialized repairs and technological refurbishment of used electronic product components are performed such that the remanufactured product meets or achieves the same quality and performance as the original product. Raw material-production-sales-consumption-recycling-remanufacturing is a closed-loop supply chain (CLSC) management model for product remanufacture. Compared with the traditional supply chain production model, the closed-loop supply chain management model can effectively use the residual value of electronic waste, thereby improving resource utilization and reducing environmental pollution. In particular, in the field of consumer remanufacturing, electronic products have unique characteristics due to their short life cycle, which is different from other closed-loop supply chain models for consumer goods: for example, in the United States,\"Post-consumer carpets\" are recycled for the extraction of recyclable materials and the creation of new products outside the new carpet [34]. This paper focuses on the internal cycle remanufacturing of electronic products and studies the closed-loop supply chain operation mode. Closed-loop supply chain pricing decisions directly affect the consumer market capacity. Obviously, when new products, remanufactured products and refurbished products emerge in the market, adopting a non-discriminating pricing strategy for the three will inevitably lead to a disordered CLSC management model. Implementing differential pricing strategies has become one of the key measures for companies to improve profitability. For example, Apple will sell remanufactured products with the \"Apple certified\" logo to consumers through a 50-70% discount on new products through online sales channels, thereby achieving the dual optimization of social and economic benefits. This shows that the differential pricing model has important and practical significance for CLSC management. Currently, the optimal pricing of remanufactured products has drawn academic attention: [PERSON] et al. [5] considered manufacturers and retailers as recyclers to discuss the selection of recycling channels and product pricing strategies; [PERSON] et al. [6] emphasized the reverse supply chain. The coordination problem of pricing decision in China resulted in a qualitative analysis of the key factors of the CLSC coordination; [PERSON] [7] discussed the adjustment of the pricing strategy under the condition of cost perturbation; [PERSON] [8] studied the optimal recovery cost. [PERSON] et al. [9], based on the recovery competition between dual recycling channels and original equipment manufacturers, studied the optimal selection of recycling cores under the three selection models.