Okay kiddo, let me explain secession in China so that it's easy for you to understand.
China is a huge country with many different regions and ethnic groups. Some people in these regions and groups may feel like they want to be separate from the rest of the country and have their own country. This is called secession.
Imagine if you and your friends were playing a game, but some of your friends didn't want to play by the same rules as everyone else. They might want to make up their own game and play by their own rules. That's kind of like what secession is - it's when a group wants to break away from the rest and do things their own way.
In China, there are a few regions where some people want to secede. One of these regions is called Tibet. There, some people want to form their own country because they feel like their culture and way of life is different from the rest of China. Another region is called Xinjiang, where some people feel like they are being treated unfairly by the Chinese government.
But, the Chinese government doesn't want any regions to break away from the country. They want to keep everyone together and united as one country. They believe that everyone should follow the same rules and laws, and work together to make China a strong and prosperous country.
So, secession in China means that some people in certain regions want to form their own country, but the Chinese government wants to keep everyone together as one country.