Function introduction:
        1. Order opening function:
        • Supports quick search and selection of products, and easily generates orders.
        • Automatically calculate the order total, discounts and taxes to reduce the probability of errors.
        2. Return function:
        • Quickly find orders and record returned items by order.
        • Support full or partial returns to flexibly meet different needs.
        • Automatically calculate the refund amount and record the return details for subsequent statistics.
Advantage highlights:
        • Simple and efficient operation interface: The design is simple and intuitive, merchants can quickly get started and complete daily operations easily.
        • Clear order management: All order and return records can be tracked, making it easier for merchants to make subsequent reconciliations and statistics.
        • Reliable performance: Optimized for billing and returns scenarios, ensuring fast and smooth operations.