With years of in-depth development experience in reverse purchasing and cross-border independent station tracks, I have found that most open-source purchasing system source code and generic purchasing mall projects suffer from loose architecture, serious front-end and back-end coupling, poor high-concurrency fault tolerance, and conflicting multi-business modules. Many individual developers and small technical teams make a common mistake when building a reverse overseas purchasing system — they blindly adopt universal e-commerce frameworks while ignoring exclusive business logic of cross-border purchasing, purchasing consolidation, and transshipment fulfillment. This eventually leads to frequent online bugs such as overselling, delayed data synchronization, and disordered orders.…