First of all, you should make sure that your husband has never been to these places. You can check his WeChat chat record, transfer record, circle of friends and so on. To determine whether he is connected with these places. If you find any suspicious evidence, you should call the police immediately.
Secondly, you should communicate frankly with your husband and ask him why he joined these whoring groups and whether he knows other members of these groups. If your husband admits his behavior, you should discuss with him how to solve the problem.
Finally, you should consider taking some measures to prevent similar incidents from happening again. You can ask your husband to tell you his WeChat password and payment password, and check his WeChat chat records and transfer records regularly. In addition, you can also consider installing monitoring software or applications to monitor your husband's WeChat usage.
In short, if you find that your husband is soliciting prostitutes, you should take appropriate measures to protect your family and property. At the same time, you should communicate frankly with your husband and ask for help and support.