BeiDou

Beidou is a system that helps people know where they are in the world. It's like a big map that shows you where you are and helps you find your way to where you want to go.

To do this, Beidou uses special satellites that orbit around the Earth. These satellites send signals down to your phone or other device that tells it where you are.

Think of it like a treasure map that shows you where the treasure is. The satellites are like the mapmakers who draw the map and the signals they send down are like little arrows that point you in the right direction to find the treasure.

With Beidou, you can also get information about things like weather patterns and earthquakes. This can help you stay safe and make better decisions.

Overall, Beidou is a really helpful tool that helps people know where they are in the world and find their way around.