2. It is composed of the origin of 65438 +0 to 9, representing numbers. Their arrangement is three horizontal and three vertical, which can be separated by the word "well". The center number is 5. Starting with the numbers in the box below, the numbers are 1, 8, 3, 4, 9, 2, 7 and 6. This arrangement will be 15, regardless of the sum of three numbers in the horizontal, vertical and diagonal directions. This is the Jiugongge, which is often called Jiugongge.