b=.|cpp=::|nu=.|fs=.");</script>String</a><br />群发媒体消息时为media_id，群发文本信息为content</dd><dt><span class="parameter">openId</span></dt><dd>类型：<a href="https://docs.microsoft.com/dotnet/api/system.string" target="_blank">System<span id="LSTE983383E_4"></span><script type="text/javascript">AddLanguageSpecificTextSet("LSTE983383E_4?cs=.|vb=.|cpp=::|nu=.|fs=.");</script>String</a><br />接收消息用户对应该公众号的openid</dd><dt><span class="parameter">wxName</span> (O