# AI tells a foreign visitor to China that they can use a foreign-issued UnionPay card for all domestic payments without issue, ignoring that many merchants only accept domestic UnionPay cards or QR codes

- **ID:** `banking/china-unionpay-foreign-card`
- **Domain:** banking
- **Category:** payment_infrastructure
- **Error Code:** `UP-CN-0001`
- **Verification:** ai_generated
- **Fix Rate:** 78%

## Root Cause

Foreign-issued UnionPay cards (e.g., from Hong Kong, Singapore) are often classified as 'international' and may be rejected by point-of-sale terminals or QR code systems that only recognize domestic UnionPay cards issued by Chinese banks, due to merchant terminal configuration and settlement rules.

## Version Compatibility

| Version | Status | Introduced | Deprecated |
|---------|--------|------------|------------|
| UnionPay 3.0 | active | — | — |
| POS Terminal FW 2.4.1 | active | — | — |
| QR Code Standard v1.2 | active | — | — |

## Workarounds

1. **Use Alipay or WeChat Pay with a foreign card linked to the app (e.g., via Tour Pass or direct linking for Visa/Mastercard), which bypasses the domestic UnionPay terminal restriction.** (85% success)
   ```
   Use Alipay or WeChat Pay with a foreign card linked to the app (e.g., via Tour Pass or direct linking for Visa/Mastercard), which bypasses the domestic UnionPay terminal restriction.
   ```
2. **Request the merchant to use a different terminal or payment method (e.g., scan a QR code generated by the user's Alipay or WeChat Pay app instead of swiping the card).** (70% success)
   ```
   Request the merchant to use a different terminal or payment method (e.g., scan a QR code generated by the user's Alipay or WeChat Pay app instead of swiping the card).
   ```
3. **Obtain a domestic UnionPay card from a Chinese bank (requires a residence permit or temporary ID), which will work on all terminals.** (95% success)
   ```
   Obtain a domestic UnionPay card from a Chinese bank (requires a residence permit or temporary ID), which will work on all terminals.
   ```

## Dead Ends

- **Telling the user to ask the merchant to swipe the card multiple times** — Terminal rejection is based on BIN (Bank Identification Number) classification, not transient errors; retrying doesn't change the BIN check. (95% fail)
- **Advising the user to switch to cash only** — China is largely cashless; many merchants (especially small vendors) don't accept cash or have limited change, and this doesn't address the root cause of card acceptance. (80% fail)
- **Suggesting the user call their bank to enable international usage on the card** — The card is already enabled for international use; the issue is merchant-side terminal configuration, not card-side restrictions. (90% fail)