Analysis: It's a number puzzle problem. According to the pattern, we find that $173+286=459$. Therefore, the sum of "He Xin Chun" is 18.
1. In the addition equation on the right, each Chinese character represents a non-zero digit, and different characters represent different digits. When the equation holds, 贺十新十春 $=(\quad)$.
(A) 24
(B) 22
(C) 20
(D) 18 Set off firecrackers