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"Looking up to observe astronomy, looking down to observe geography, this is why we know the brightness." From "The Book of Changes". In the rivers and lakes, you can see the bright things happening in the rivers and lakes. If you look up to see the situation in the rivers and lakes, and if you lower your head to observe the things in the rivers and lakes, you can know the reasons for the changes in the martial arts world and understand the changes in the martial arts world. See the turmoil in the world and show off your martial arts style, all in this book. Welcome to taste.