: Learn to use existing numbers or signed numbers to simplify problems. As usual, if you are not sure how many numbers to fill in a certain empty space, you can refer to the parallel algorithm to use this pair style of numbers. 12. Convergence and push in the same direction 26182

- Which day is our country Fire Protection Day in Baoying County
- : Using the common one-row, row-and-column solution, you can replace the non-eligible numbers with a trial-and-error strategy until you find the correct answer or try to find out which number in the row and column column paves the way.
- Which nine gold is the Chinese nine gold in Baoying County