微信加入群聊为什么还得绑定银行卡

微信加入群聊在100人以上时是需要绑定银行卡的。这应该是微信系统设定，绑定银行卡最主要是可以完成身份验证，保证用户的真实性，另外当然绑定银行卡也方便发红包，转账等有关支付方面的东西。
/iknow-pic.cdn.bcebos.com/472309f7905298221207de32dbca7bcb0a46d40f"target="_blank"title="点击查看大图"class="ikqb_img_alink">/iknow-pic.cdn.bcebos.com/472309f7905298221207de32dbca7bcb0a46d40f?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/472309f7905298221207de32dbca7bcb0a46d40f"/>
绑定银行卡方法/步骤：
1、登入微信，点击有下角的【我】。
/iknow-pic.cdn.bcebos.com/024f78f0f736afc363e9d894bf19ebc4b645125d"target="_blank"title="点击查看大图"class="ikqb_img_alink">/iknow-pic.cdn.bcebos.com/024f78f0f736afc363e9d894bf19ebc4b645125d?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/024f78f0f736afc363e9d894bf19ebc4b645125d"/>
2、选择【我的钱包】。
/iknow-pic.cdn.bcebos.com/55e736d12f2eb9383ee39d03d9628535e4dd6fb1"target="_blank"title="点击查看大图"class="ikqb_img_alink">/iknow-pic.cdn.bcebos.com/55e736d12f2eb9383ee39d03d9628535e4dd6fb1?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/55e736d12f2eb9383ee39d03d9628535e4dd6fb1"/>
3、点击上方的图标【银行卡】。
/iknow-pic.cdn.bcebos.com/060828381f30e924855b7bc040086e061c95f740"target="_blank"title="点击查看大图"class="ikqb_img_alink">/iknow-pic.cdn.bcebos.com/060828381f30e924855b7bc040086e061c95f740?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/060828381f30e924855b7bc040086e061c95f740"/>
4、选择【添加银行卡】。
/iknow-pic.cdn.bcebos.com/11385343fbf2b211159362bfc68065380dd78e86"target="_blank"title="点击查看大图"class="ikqb_img_alink">/iknow-pic.cdn.bcebos.com/11385343fbf2b211159362bfc68065380dd78e86?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/11385343fbf2b211159362bfc68065380dd78e86"/>
5、输入银行卡号。
/iknow-pic.cdn.bcebos.com/8694a4c27d1ed21bfbdfc914a16eddc451da3f29"target="_blank"title="点击查看大图"class="ikqb_img_alink">/iknow-pic.cdn.bcebos.com/8694a4c27d1ed21bfbdfc914a16eddc451da3f29?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/8694a4c27d1ed21bfbdfc914a16eddc451da3f29"/>
6、填写【姓名】、【身份证号】和【手机号】，点击【下一步】。
/iknow-pic.cdn.bcebos.com/7a899e510fb30f244b990bf2c495d143ad4b033b"target="_blank"title="点击查看大图"class="ikqb_img_alink">/iknow-pic.cdn.bcebos.com/7a899e510fb30f244b990bf2c495d143ad4b033b?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/7a899e510fb30f244b990bf2c495d143ad4b033b"/>

7、这时会发一个验证码到前面填写的手机上。
/iknow-pic.cdn.bcebos.com/b64543a98226cffc3c3f5843b5014a90f603ea2e"target="_blank"title="点击查看大图"class="ikqb_img_alink">/iknow-pic.cdn.bcebos.com/b64543a98226cffc3c3f5843b5014a90f603ea2e?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/b64543a98226cffc3c3f5843b5014a90f603ea2e"/>
8、设置支付密码。
/iknow-pic.cdn.bcebos.com/8d5494eef01f3a29958d323f9525bc315d607cfe"target="_blank"title="点击查看大图"class="ikqb_img_alink">/iknow-pic.cdn.bcebos.com/8d5494eef01f3a29958d323f9525bc315d607cfe?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/8d5494eef01f3a29958d323f9525bc315d607cfe"/>
9、再输入一次密码。
/iknow-pic.cdn.bcebos.com/f3d3572c11dfa9ecc12bb1e66ed0f703918fc13e"target="_blank"title="点击查看大图"class="ikqb_img_alink">/iknow-pic.cdn.bcebos.com/f3d3572c11dfa9ecc12bb1e66ed0f703918fc13e?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/f3d3572c11dfa9ecc12bb1e66ed0f703918fc13e"/>
10、就设置完成了，在钱包里，就可以看到银行卡了。
/iknow-pic.cdn.bcebos.com/d8f9d72a6059252da73dfaf5389b033b5bb5b91d"target="_blank"title="点击查看大图"class="ikqb_img_alink">/iknow-pic.cdn.bcebos.com/d8f9d72a6059252da73dfaf5389b033b5bb5b91d?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/d8f9d72a6059252da73dfaf5389b033b5bb5b91d"/>

微信群超过100人之后再加入的就需要绑定银行卡了。

微信加入群聊时，如果群人数小于100，可以由群内好友邀请（无需本人同意）或者扫描二维码直接进入。
如果超过100人，必须绑定银行卡。
如果是群内好友邀请的，需要本人同意，如果是扫描二维码进入的，还需要群主同意。

为了安全.