Thus, having planets in someone's 7th house in synastry is indicative of mutual attraction.

因此，有行星在对方的第七宫将表示相互间的吸引力。

youdao

That was when I got the following idea. You can compare the horoscopes of two people aspect by aspect (synastry) and you can make a Davison chart for the relationship.

在那时我得到了下面的想法，你可以一个相位一个相位地去比较两个人的本命盘（合并盘），并且你可以为这段关系做一个戴维森盘。

youdao