1. Confirm the billing information, including the buyer's name, contact information, purchase date and amount. This information can be provided to the sales staff of Baifu Jewelry when purchasing jewelry.

2. You can go to the physical storefront of Baifu Jewelry, go to the after-sales service desk or the financial office to issue invoices. If you can't get to the store, you can also contact the customer service phone or online customer service platform of Baifu Jewelry to provide them with the required billing information and consult their specific requirements and processes.

3. When applying for an invoice, you need to provide the payment voucher used when purchasing jewelry, such as invoices, receipts or bank transfer records.

4. Once the required information and payment voucher are provided, the staff of Baifu Jewelry will check the information and issue an invoice.