Best Practices for JD Retail Reverse Order Fulfillment: B‑PaaS Architecture, Domain Modeling, and System Upgrade

The article introduces JD Retail's reverse order fulfillment platform, which handles almost all pre‑sale reverse interception and refund operations, supporting high‑concurrency consumer traffic and complex group order, goods, and financial flows.

Background: The author’s agile team upgraded two subsystems (contract termination and cancellation) to a B‑PaaS architecture, achieving cross‑functional breakthroughs in business support, product communication, and system delivery.

Business Support: Through PaaS upgrades, the platform now supports SKU‑adjusted refunds, B‑mall intent‑order reverse flows, and integrates with multiple group strategic projects.

Product Support: By consolidating handlers and interceptors, the platform reduced product communication effort by 83% and unified over 65 common processes.

System Support: PaaS migration reduced maintenance staff by half and enabled shared core kernels across vertical business lines.

Product Overview: The fast‑return platform provides physical or virtual refunds for consumers, merchants, risk control, and customer service, forming an integrated pre‑sale contract termination solution.

Domain Modeling: The article outlines a four‑module domain model (application, interception, review, execution), explains process, domain, identity, and data modeling, and presents visual diagrams for each step.

Model Verification: A message‑driven architecture validates the model against real business scenarios.

B‑PaaS Implementation: Detailed engineering architecture, process analysis, domain activity analysis, business identity mapping, and capability visualization are described, including annotation‑based reporting.

Summary: By applying B‑PaaS, domain modeling, and visualized capabilities, the fast‑return platform achieves scalable, maintainable, and efficient support for complex reverse order fulfillment, offering a reference for modernizing legacy debt systems.