应答码说明
<table>
<thead>
<tr>
<th>应答码</th>
<th>应答码说明</th>
</tr>
</thead>
<tbody>
<tr>
<td>0000</td>
<td>业务处理成功</td>
</tr>
<tr>
<td>1001</td>
<td>业务处理失败</td>
</tr>
<tr>
<td>1002</td>
<td>订单号不存在</td>
</tr>
<tr>
<td>1004</td>
<td>参数异常</td>
</tr>
<tr>
<td>1011</td>
<td>交易信息不存在</td>
</tr>
<tr>
<td>1012</td>
<td>用户绑卡状态为未绑卡</td>
</tr>
<tr>
<td>1021</td>
<td>验签或解密异常</td>
</tr>
<tr>
<td>2001</td>
<td>绑卡异常：重复绑卡</td>
</tr>
</tbody>
</table>