I thought about Jilin Yongji.

Actually, I can't give you these specific information. But I think you can find it through the media in Jilin City (Yongji County belongs to Jilin City)! Jilin TV has a program called "Live Jiangcheng", and the telephone number is 0432-4567890. This program is good and should be helpful to you. I think it will be very effective through media like TV. I hope you can find your relatives soon.