1. The vendor will present a QR code.
2. You scan it with WeChat or Alipay. 3. A form appears on your phone where you input the company's full name (`抬头 táitóu`) and its tax ID number (`税号 shuìhào`). Most people save this information in their app to auto-fill. 4. You submit the form, and the official PDF of the `电子发票` is sent to your phone's "My Fapiao" or "Card & Vouchers" section within seconds. * **The Goal: Reimbursement (报销):** The single most common reason for an individual to collect fapiaos. Companies in China have strict policies requiring official fapiaos for all reimbursed expenses. At the end of a business trip, an employee will submit a folder of all their collected fapiaos (or their digital equivalents) to the finance department. Without them, you don't get your money back. * **Formality:** Asking for a `fāpiào` is a completely normal, neutral part of any transaction. It is neither formal nor informal.