You can know each other's marital status by going to the civil affairs bureau where you are registered. Hold my ID card or residence booklet to the marriage registration office of the civil affairs department where the account is located. But if you entrust a friend to help you inquire, you must have a notarized power of attorney.
Step 2 ask a friend
Consult the friend of the object of inquiry, of course, secretly consult to avoid embarrassment between the two sides.
Step 3 ask the neighbors
As the saying goes, a distant relative is not as good as a close neighbor, and the neighbor across the hall is the easiest person to grasp the situation. Ask your neighbors about their daily life, and you will get a general idea of what you want to know.