8. (12 points) In the lower left table, adding 1 or subtracting 1 simultaneously to the numbers in two cells that share a common edge is called one operation. After a finite number of operations, the table changes from Table 1 to the table on the right. What is the number in position $A$ in Table 2? $\qquad$
【Solution】Solution: For a $3 \times 3$ grid coloring, then,
Since each operation involves simultaneously adding 1 or subtracting 1 from the shaded and unshaded parts, the difference between the sum of the numbers in the shaded part and the sum of the numbers in the unshaded part remains constant. Initially, the difference is 5, so no matter how many operations are performed, the difference remains 5, thus we have $4 \times 2010 + A - 4 \times 2010 = 5$,

Therefore, $A = 5$.
The answer is 5.