In 1984, the rat was the son.
In the year 1987, the rabbit was the Mao
Numerology says that the son and the mao are in cross-square, which means that if they are together, there may be something. Punishment and injury occurred. So they are inconsistent in terms of zodiac signs.
But the world is full of wonders, so if two people treat each other sincerely, why should they care about Yin Yang and the Five Elements.