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This is called a "castle." It has lots of fireworks and it is burned at the end of the festival around 23:00pm 1:00am. Depending on the weather.
There is also some traditional cooking with some woods and fire. These are the most delicious food you can ever have in your life. I always wait for this festival every year.
This is a short video on how it is celebrated. Watch it. You won't regret it.