1. First, explain the topic. For example, the topics and suggestions of this call are all around the theme of "* * * building a beautiful home". Write around the theme, including (but not limited to) three topics and suggestions.
2. Secondly, clarify the time and channels for collecting topics and suggestions.
3. Then, specify the topic and proposal format, write down the name, address and contact information of the sponsor, and finally write down the end and time of signature.