No, I am not making this stuff up. I have heard many, many stories from ex-pats about women trying to get money and visas from them. It is good that your dates have not brought this stuff up, but as now married man has your wife brought up resettling in the West now? This does not only apply to Chinese women but people from many countries. Maybe your partner does not say those things, but has she thought about them?
If that is on a gf's mind, it is better to bring in up in the first few dates so that she can forget about that idea or else immediately leave you and and find another sucker.
I know a German girl who married a North African and brought him to live in Germany. Once the governement allowed him to stay legally in Germany, he was out the door immediately. She was my pen-pal for fifteen years and she told me the story herself; she is still an attactive woman. Let us not forget about Wendy Murdoch who divorced Rupert Murdoch not so long ago. Read about her early life and how an American couple sponsored her to study in California. She had an affair with the husband, the husband divorced and married her, and after she got her green card then divorced that man. And the rest is history: broken marriages, a green card, and now lots of money.