为保证账户的资金安全，只能绑定本人的银行卡。根据以下步骤绑定银行卡，
工具：红米5手机、支付宝。
1、打开手机，点击桌面上的【支付宝】app。
/iknow-pic.cdn.bcebos.com/a8ec8a13632762d0cad5700baeec08fa503dc69f"target="_blank"title="点击查看大图"class="ikqb_img_alink">/iknow-pic.cdn.bcebos.com/a8ec8a13632762d0cad5700baeec08fa503dc69f?x-bce-process=image%2Fresize%2Cm_lfit%2Cw_600%2Ch_800%2Climit_1%2Fquality%2Cq_85%2Fformat%2Cf_auto"esrc="
https://iknow-pic.cdn.bcebos.com/a8ec8a13632762d0cad5700baeec08fa503dc69f"/>
2、在当前界面，点击右下角的【我的】，再点击【银行卡】。
/iknow-pic.cdn.bcebos.com/3812b31bb051f8199ab7d7fed4b44aed2f73e7f0"target="_blank"title="点击查看大图"class="ikqb_img_alink">/iknow-pic.cdn.bcebos.com/3812b31bb051f8199ab7d7fed4b44aed2f73e7f0?x-bce-process=image%2Fresize%2Cm_lfit%2Cw_600%2Ch_800%2Climit_1%2Fquality%2Cq_85%2Fformat%2Cf_auto"esrc="
https://iknow-pic.cdn.bcebos.com/3812b31bb051f8199ab7d7fed4b44aed2f73e7f0"/>
3、在当前界面，点击右上角的【+】号可以进入绑定界面。
/iknow-pic.cdn.bcebos.com/4afbfbedab64034f7e2916b2a1c379310b551d99"target="_blank"title="点击查看大图"class="ikqb_img_alink">/iknow-pic.cdn.bcebos.com/4afbfbedab64034f7e2916b2a1c379310b551d99?x-bce-process=image%2Fresize%2Cm_lfit%2Cw_600%2Ch_800%2Climit_1%2Fquality%2Cq_85%2Fformat%2Cf_auto"esrc="
https://iknow-pic.cdn.bcebos.com/4afbfbedab64034f7e2916b2a1c379310b551d99"/>
4、输入本人的银行卡号，输入完成后，点击【下一步】。
/iknow-pic.cdn.bcebos.com/9922720e0cf3d7ca2911ebc2fc1fbe096a63a99b"target="_blank"title="点击查看大图"class="ikqb_img_alink">/iknow-pic.cdn.bcebos.com/9922720e0cf3d7ca2911ebc2fc1fbe096a63a99b?x-bce-process=image%2Fresize%2Cm_lfit%2Cw_600%2Ch_800%2Climit_1%2Fquality%2Cq_85%2Fformat%2Cf_auto"esrc="
https://iknow-pic.cdn.bcebos.com/9922720e0cf3d7ca2911ebc2fc1fbe096a63a99b"/>
5、确认好信息之后，就可以点击【同意协议并绑卡】，点击之后就会绑定成功了。
/iknow-pic.cdn.bcebos.com/b90e7bec54e736d1bdf358bc95504fc2d46269a6"target="_blank"title="点击查看大图"class="ikqb_img_alink">/iknow-pic.cdn.bcebos.com/b90e7bec54e736d1bdf358bc95504fc2d46269a6?x-bce-process=image%2Fresize%2Cm_lfit%2Cw_600%2Ch_800%2Climit_1%2Fquality%2Cq_85%2Fformat%2Cf_auto"esrc="
https://iknow-pic.cdn.bcebos.com/b90e7bec54e736d1bdf358bc95504fc2d46269a6"/>