There are many ways to expand the topic: for example, use things around you to stimulate new topics, draw inspiration from your own environment, make comments or ask questions, so as not to have nothing to say. Ask open-ended questions to give the other person a chance to think about their answers and say something more detailed than yes or no. Then find the materials to build the topic from each other's answers. Looking for the same interests. When we find that we have something in common with someone, it is a precursor to creating a positive chat atmosphere. Describe a thing, if others don't understand our statement, let's put it another way, maybe others will understand. The same is true when expressing. If you can explain an idea from different angles, it will be easier for others to understand than if you start from one direction.
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