This old guy also got interested and cleared his throat to explain, "This is the top talent for cultivating the Yin-Yang Dao. The so-called Dual Cultivation always emphasizes the union of Yin and Yang, mutual understanding of hearts, matching destiny, similar levels of cultivation, and the closeness of skin—the five commonalities!
If all five commonalities are present, needless to say, it's a match made in heaven, a pair that will soar side by side, a fine match blessed by the God of Marriage; missing out on it would truly be a pity. If three or four commonalities exist, one can also advance quickly in cultivation, achieving twice the result with half the effort, joining together in Chanjuan. But if there are only one or two commonalities, then it's no good—the path would deviate, and the mutually beneficial arrangement would be lost in compensation, with one side surely suffering."
A passerby asked, "What if there's not even one commonality?"
