Deprecated: Return type of LLMS_Post_Model::jsonSerialize() should either be compatible with JsonSerializable::jsonSerialize(): mixed, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /www/zhangxipiano_713/public/wp-content/plugins/lifterlms/includes/abstracts/abstract.llms.post.model.php on line 1060
Deprecated: Return type of LLMS_Notification::jsonSerialize() should either be compatible with JsonSerializable::jsonSerialize(): mixed, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /www/zhangxipiano_713/public/wp-content/plugins/lifterlms/includes/models/model.llms.notification.php on line 270 第31、34 、86首：三连音式和弦分解弹奏 – 张希教授钢琴空间
