multiple city code violations, nothing illegal about coming to the u.s. to have a baby. >> this is a hot topic for the show. >> reporter: cat cho the host of a chinese radio show and says l.a. is a hub. >> it's like insurance, isn't it? for your future? >> there you go. insurance. i think the parents they really want to do everything for the kids. >> reporter: attorney dang says while maternity tourism is controversial it's a fasttrack to citizenship for the privileged. >> they could enjoy the retirement benefit and best medical care that america -- the government could offer. >> reporter: i went to meet one of the customers. >> when is your baby due? >> reporter: she declined to appear on camera but told me she's from shanghai. >> part of the immigration debate do it the right way and wait in line. people who have money aren't waiting in line. >> the they are not waiting in line. but they did not violate any law, okay. again, if you really want to