Djong is a big boat that people used to sail on a long time ago, like when your great-grandparents were young. It's a type of boat that's really good for carrying lots of things, like food or other stuff, across the water.
The djong can be very, very big- much bigger than your house! It has a special shape that helps it move through the water. The front of the boat is pointy and goes up into the air, and the back is flat. This helps the boat go faster and not get stuck in the water.
When people sailed the djong, they had to be very careful not to crash into anything, like rocks or other boats. Sometimes they would use big oars to help direct the djong in the right direction. The people on the djong would also have to make sure there was enough food and water for everyone on board to last the journey.
Overall, the djong was a very important boat for people who had to travel long distances over water, and people used it for many, many years before other types of boats were invented.