2. "How to recover economic losses": If negotiation with her fails, you can sue to the court for settlement. If you don't get a marriage certificate, you can ask for the return of the bride price. It is clearly stipulated in the judicial interpretation of the Supreme People's Court, but it must be proved that it is a bride price, not a bride price.
Attachment: "the Supreme People's Court on the Application of"
(1) Both parties have not gone through the marriage registration formalities; (2) Both parties have gone through the marriage registration formalities, but they have not lived together; (3) premarital payment, causing difficulties to the payer.
The application of items (2) and (3) of the preceding paragraph is conditional on the divorce of both parties.
3. If the man knows the woman's name, age, home address, contact information and other basic identity information, he can sue. The lawsuit should go to the court where the woman's household registration is located or where she has lived for more than one year. If the man is inconvenient in Beijing, he can entrust a local lawyer to sue on his behalf.
General litigation should be filed in Lianyungang. If there is evidence that the woman has lived in Suzhou for more than one year (except hospitalization), she can bring a lawsuit in Suzhou.