One-stop membership & top-up card issuance and redemption
Lianhong Card Store sells and redeems membership / top-up cards; users sign in via UM unified identity, orders sync with UM billing quota.
Standard REST, unified error codes and pagination.
| Method | Path | Description |
|---|---|---|
| GET | /api/cards | Card catalog |
| POST | /api/order | Place card order |
| POST | /api/redeem | Redeem card |