Okay, so imagine you're playing with all of your toys at home, but one day your family decides to move to a new house in another town. This is kind of like what's happening in China right now, but instead of families moving, it's people leaving the country to go live and work in other places.
Lots of people in China are leaving for different reasons - some want better job opportunities, more freedom, or just a change of scenery. Just like how you might want to move somewhere else because it has a bigger playground or better toys to play with.
Some people think that this exodus is a big deal because China is such a huge country with so many people in it. Imagine if all of the kids on your block suddenly moved away - things would feel very different! But other people think that it's not that big of a deal, and that people moving around is just a normal part of life.
Overall, the China exodus just means that lots of people are leaving China to go live and work in other places. It's a bit like moving house, but on a much bigger scale!