| 1 | Request information missing or invalid |
| 2 | The signature parameter is incorrect. |
| 21 | The OTP code is incorrect. |
| 22 | The OTP code has expired, please perform the transaction again. |
| 30 | The order code is duplicated, please perform the transaction again. |
| 32 | The payment amount is invalid. |
| 33 | Transaction failed. |
| 34 | The transaction is being processed, please check again later. |
| 36 | The transaction does not exist. |
| 39 | The user has entered the OTP code incorrectly too many times. |
| 40 | The transaction has been refunded. |
| 41 | The transaction was successful previously. |
| 42 | The request to obtain the OTP code has exceeded the specified number of attempts |
| 52 | Invalid payment method |
| 65 | Invalid account |
| 70 | You have exceeded the daily transaction limit, please try again later. |
| 75 | Insufficient funds for payment |
| 84 | The transaction amount exceeds the allowed limit, please contact support for assistance. |
| 93 | The transaction refund time has elapsed. |
| 94 | The system is under maintenance, please try again later. |
| 99 | Unknown error, please check the transaction again later |
| 106 | The transaction does not support partial refunds. |
| 125 | Unable to refund the transaction as the refund period has expired |
| 162 | You have exceeded the monthly transaction limit, please try again later. |
| 401 | Authentication error |
| 500 | The system encountered an error, please try again later. |