Solution: Let each of the original 62 squares be m2, and n2 after array change. According to the meaning of the question, the following equations can be listed:

N2-1= 62m2

(n-1) (n+1) = 62m2.

Observe that the left side of the above formula is two consecutive even or odd numbers, and the right side is the product of 62 and m2.

Then the above formula can be changed to:

(n- 1)(n+ 1)= 62 m2 =(63- 1)(63+ 1)= 62 * 82

That is, n=63

n2=3969

A: There are 3,969 Yue Jiajun, including Yue Fei.

(Square cannot be displayed here, the 2 after the letter is a square, and the 2 after 8 in 62*82 is also a square. )