Okay kiddo, so the Jinan Incident happened a few years ago in a place called China. It was like a big problem that happened because some people from different groups were fighting with each other.
You know how sometimes you and your friends might get into an argument or fight, right? Well, that's kind of like what happened, except instead of just a few people, there were a lot of them.
They were upset with each other for different reasons and it got really intense, which means it got very serious and scary. People ended up getting hurt and some even lost their lives.
The police and other people in charge had to come in and try to stop it from getting worse. They did their best, but it took some time for things to calm down and for everyone to be safe again.
So basically, the Jinan Incident was a really sad and scary situation where a lot of people were fighting with each other and it got very violent. But thankfully, the people in charge were able to stop it from getting even worse and eventually things went back to normal.