China's Digital Currency Electronic Payment (DCEP) is a financial innovation led by the central bank that aims to improve payment efficiency, enhance monetary sovereignty, and ensure the regulability of transactions. However, despite the rollout of DCEP in several pilot cities, its adoption among the bank user community still faces some resistance. Based on the Technology Acceptance Model (TAM) and Diffusion of Innovations (DoI) theory, this study constructs a conceptual framework for DCEP adoption, and explores the effects of Perceived Usefulness (PU), Perceived Ease of Use (PEU), Perceived Risk (PR), Financial Literacy (FL), and Adopter Category (AC) on user adoption intentions. It is found that PU is the main factor driving users' adoption of DCEP, while PR significantly and negatively affects adoption intention, especially among the group with lower financial literacy. In addition, FL and AC moderated the DCEP adoption process, with early adopters more likely to accept the technological advantages of DCEP, while late adopters were more influenced by the social environment and policy incentives. Based on the findings, this study makes recommendations to optimise user experience, enhance security, increase policy incentives and strengthen financial education to promote wider adoption of DCEP. The findings not only deepen the understanding of digital currency adoption mechanisms, but also provide practical references for the promotion of DCEP and future central bank digital currencies (CBDC).