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Using online mind maps makes it easy to embed your mind maps into web pages, various social media and other places. These create excellent conditions for sharing. You can send an email invitation from these applications, asking partners in different places to view the mind map and edit and modify it according to their opinions.爱情保卫战2021，节目把现实中青年男女在恋爱过程中遇到的各种困惑与矛盾搬上舞台，双方通过交流、沟通与争辩把内心的痛苦与困惑全盘托出。节目现场邀请情感导师为情侣提供理性分析、科学考量、恋爱指导和情感忠告，倡导正确的恋爱观、婚姻观、幸福观。同时也邀请明星夫妻等社会人士指导。唐贞观年间， 西凉 叛乱， 李世民 御驾亲征，被敌帅 苏宝同 围困在锁阳城， 主帅 ， 薛仁贵 也被 苏宝同 的毒刀所害，命在旦夕。 薛仁贵 之子 薛丁山 获知父亲遇难，参加了二路平乱大军，西去救父。　　某天，以母亲莱萨的白笛被发现为契机，Printing the screenshot above, we can see that the subscriber receives every message from the publisher. However, for Xiao Hong, she only wants to receive messages with red color and does not want to receive messages with black color. Therefore, we need to make the following modifications to the code. We can first add a key so that the subscriber can only subscribe to messages of interest to herself. The code is as follows: