如何创建永不失效的群活码

<p><img src="https://www.showdoc.com.cn/server/api/attachment/visitFile?sign=30085609f908eb7d5bfe0bb2d485fe9a&amp;file=file.png" alt="" /></p> <p><img src="https://www.showdoc.com.cn/server/api/attachment/visitFile?sign=3c9ee17aa5a59edddb89427620f661d5&amp;file=file.png" alt="" /></p> <p><img src="https://www.showdoc.com.cn/server/api/attachment/visitFile?sign=90501896854150191e2d5c83af4bc010&amp;file=file.png" alt="" /></p> <p><img src="https://www.showdoc.com.cn/server/api/attachment/visitFile?sign=6324e2f286e840207b12fe2e91b83c76&amp;file=file.png" alt="" /></p> <p><img src="https://www.showdoc.com.cn/server/api/attachment/visitFile?sign=9a0c4a5adf43d09df0e38f6c92457222&amp;file=file.png" alt="" /></p> <p><img src="https://www.showdoc.com.cn/server/api/attachment/visitFile?sign=ed8de25fb86d64a5534c6558f76606eb&amp;file=file.png" alt="" /></p> <p><img src="https://www.showdoc.com.cn/server/api/attachment/visitFile?sign=745448a4cbe4d2ad0a3e12d04878b1d7&amp;file=file.png" alt="" /></p>