Regarding Asian collections outside of mainland china. besides what was mentioned above, they have been kept at Singapore Zoo and Kumamoto City Zoo in Japan. I could be wrong but I think Kumamoto City Zoo still keeps them
In the North America, I know they have been kept at San Diego Zoo, Los Angeles Zoo, San Francisco Zoo, Columbus Zoo, Minnesota Zoo, Cleveland Zoo, Milwaukee County Zoo, Cincinnati Zoo and Toronto Zoo
In Europe, Dublin Zoo kept them in the 1980s, Rotterdam Zoo showed interest in keeping them, but plans didnt end up happening for some reason
I am compiling my information from different threads on this forum and putting it on one post