The male version of the Peach Blossom Star was of the Yang element. It symbolized fate.
The female version of the Peach Blossom Star was of the Yin element. It symbolized marriage.
According to the Qi Inspection Technique, the Peach Blossom Star would only react to ladies who were gentle and beautiful, and men who were suave in appearance.
A red thread drawn between the two stars would act as a go-between and signify that a couple would share deep affection upon marriage.
Of course, the Qi Inspection Technique itself had no binding force. It simply meant that Bai Yutang and Constable Li may be bounded by fate and if good fortune were to befall them, then they would tie the knot. However, it did not necessarily mean that they would definitely become a married couple.
Men whom the Peach Blossom Star reacted to tended to have romantic and passionate personalities and were popular with the opposite sex. Therefore, they were not easily bound by marriage.