I don’t dare to take it seriously. Is the birthday, especially the time, provided by the poster accurate? Are you sure it's between 3 a.m. and 5 a.m. and not between 1 a.m. and 3 a.m.? Is this time Beijing time (for example, if your birthplace is in Xinjiang Province, there is a time difference between Beijing time and Beijing time). If the poster can be sure that it is this time, then the poster's birthday horoscopes are Jisi, Yihai, Guisi, and Jiayin, which do not belong to the pure yin horoscopes, because the time is Yinshi, the heavenly stems and the wood are revealed, and the stems and branches belong to yang. According to the poster's horoscope, the sun, stem, and water are born in the month of Hai. There is no foundation in the horoscope, and the self-power is weak. The seven kills are strong, the earthly branches Si and Hai are in conflict, and the Yin and Si are crossing/square each other, so the hands and feet will be cold in the four seasons and other things. Some feelings are actually problems in fate and have nothing to do with the so-called all-yin horoscopes.
If the birthday of the original poster’s girlfriend can be determined correctly, then her birthday horoscopes are Yichou, Jichou, Yimao, and Guiwei, which are pure Yin horoscopes. Rigan Yimu is extremely prosperous in this fate. As for the relationship between two people, different numerology schools have very different opinions. For example, Shao Weihua insists in his book that women with pure Yin characters are not good for their spouses. However, personally, I never judge according to Shao's point of view.