Come on! Master, please come in! Fill - 1 - 2 - 3 - 4 - 5 - 6 - 7 - 8 - 9 into 9 spaces in the graph, so that the sum of 3 numbers in each row, 3 numbers in each column and 3 numbers in diagonal is - 15 Nine spaces are 3 * 3 boxes

Come on! Master, please come in! Fill - 1 - 2 - 3 - 4 - 5 - 6 - 7 - 8 - 9 into 9 spaces in the graph, so that the sum of 3 numbers in each row, 3 numbers in each column and 3 numbers in diagonal is - 15 Nine spaces are 3 * 3 boxes

According to the classic answer of "the nine sons are arranged obliquely, the upper and lower parts are exchanged, the left and right parts are changed, and the four dimensions stand out"
-6 -1 -8
-7 -5 -3
-2 -9 -4
Ha ha, come on! If you have any questions you don't understand, please answer sincerely!