# Can users use the invitation code permanently after obtaining it?

<div data-elink-language-switch="1" id="bkmrk-%E4%B8%AD%E6%96%87" style="border:1px solid #d6d9de;border-radius:6px;padding:10px 12px;margin:0 0 18px 0;background:#f8fafc;font-size:14px;">[中文](/books/2b24d/page/06409-Pgn)</div><span style="font-family:'Microsoft YaHei', '微软雅黑';white-space:pre-wrap;background-color:rgb(255,255,255);font-size:14px;">Corresponding to the product validity period configured in the teacher invitation code settings, if the validity period is set to permanent, the redeemed course will be valid indefinitely.</span>