MP_AdvancedAPIs_GroupMessage_BaseGroupMessageDataByOpenId_clientmsgid.htm">clientmsgid</a></td><td><div class="summary">
            （非必填）开发者侧群发msgid，长度限制64字节，如不填，则后台默认以群发范围和群发内容的摘要值做为clientmsgid
            </div> (继承自 <a href="T_Senparc_Weixin_MP_AdvancedAPIs_GroupMessage_BaseGroupMessageDataByOpenId.htm">BaseGroupMessageDataByOpenId</a>。)</td></tr><tr data="public;inherited;notNetfw;"><td><img src="../icons/pu