However, if 1986 male is a tiger and 1989 female is a snake, they are a very good couple.
Because:
1986 heavenly stems and earthly branches is C-Yin, C-Fire and Yin-Wood; 1989 heavenly stems and earthly branches is its own, its own soil, its own fire. Wood makes a fire, and fire makes earth. Heavenly stems and earthly branches in' 86 and' 89 are coincidences.