Many Chinese Horoscope sites mainly talk about 12 animals and match people's compatibility using only birth years.
Fortune compares people's birth years, months and days to determine compatibility level.

This is the distinctive feature of Chinese astrology.
The Chinese zodiac is an animal zodiac of twelve animal signs, and it is said that the ruling animal of the year a person is born, hides in the heart of that person.
In Chinese system of astrology, each year begins early in the calendar year on a new moon and relates to one of the twelve animals.
Their qualities "animate" the year and colour it with their distinct natures.
Curious about whether you are compatible with your love, parents, friends, relatives, colleagues…? Rooster and Dog → Four Self-punishment Signs (Zi Xing 自刑) Four zodiac signs that create a self-inflicting problem of obstruction include Dragon, Horse, Rooster and Pig.
Once you have known your Chinese animals, you can find the results quickly through the following compatibility chart. That means for example, two pig people are not suitable to be friends, partners or get married because they clash with each other.
Then click Submit button to get the love compatibility score.
According to its doctrines, the year of birth does not only tell only your age but also indicates a certain phase or aspect of sixty year circle of time.
Some of them can be compatible but some may not get along well with each other.
For example, the horse people are compatible with the Tiger, but incompatible with the Rabbit.
In a time when so many of us are seeking the perfect partner, is it realistic to think we can find true love just by relying on what the Chinese Zodiac has to offer in this regard?