There are many ways to sign messages online, which can be formal and distinctive, and can also be operated in interactive forums or pages where messages can be left. Here are several methods for your reference:

1, a formal signature message activity, can cooperate with big websites, such as Sina, Baidu and Tencent. With the theme, you can set the theme of signature message activity, for example, the signature message activity with the theme "Diaoyu Island belongs to China";

2, it can also be less formal, you can post in the post bar, indicating the theme, such as "our graduation anniversary signature message activity" as the theme, so that users can leave messages below;