1. Complete Technical Documentation: Download the full version of the documentation in the dashboard’s Help Center → API Documentation, including detailed parameter descriptions for all interfaces, an error code comparison table, and advanced usage (e.g., batch request optimization).
2. Testing Tools: It is recommended to use tools like Postman or curl to test interface connectivity first before integrating with business systems, reducing development costs.
3. Issue Feedback: If you encounter interface call exceptions or incorrect response data, seek support through the following channels:
   • Online Customer Support: Access the Support entry in the bottom right corner of the dashboard for real-time consultation and troubleshooting.
   • Ticket System: Submit a technical ticket with interface request parameters and response results. The technical team will reply within 24 hours.

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(Supplementary) Invoice-Related Instructions

1. All invoice-related operations must be completed in the Invoice module of the dashboard, following these core rules:
2. Invoices can only be issued for orders that have been successfully paid with actual monetary transactions. Purchasing plans using account balance (no actual monetary receipt or payment) does not support invoicing. Only successfully paid orders via Stripe or PayPal are eligible for invoice applications.
3. For successful orders, click View/Download Invoice to obtain the invoice in PDF format. No invoice generation permission is available for failed, canceled, or balance-paid orders.
4. Supports filtering orders by time range, payment method, and order status. Orders are displayed in descending order of payment time by default. You can switch the number of entries per page (10/20/50 entries per page) to quickly find target orders.
5. Invoice content is synchronized with core order payment information (amount, payment method, time, etc.). Once generated, it can be directly saved and printed as a voucher for reimbursement and reconciliation.