Okay, kiddo, so have you heard of China before? It's a really big country with lots of people in it. And have you heard of the United Nations (UN)? It's a group of countries that work together to try and make the world a better place.
Well, China is one of the countries in the UN! That means they get to join in on all the meetings and talks that happen to make important decisions about things like peace, health, and education.
But being a part of the UN also means that China has to follow certain rules and agreements that the other countries in the UN have all agreed to. They have to be fair and respectful to other countries, and they have to work together to solve problems.
Sometimes, China and other countries in the UN don't always agree on things, and that's okay. They can talk about their differences and try to find a solution that works for everyone.
So, in short, China is a member of the United Nations, which means they have to be a good team player and work with other countries to help make the world a better place.