美國預托證券(ADR)

sites like

http://finance.yahoo.com
http://finance.google.com

For example, 中國人壽 2628 ADR ticker symbol is LFC. You can search LFC in finance.yahoo.com to check ADR price trading in US.

If you want to lookup ticker symbol for ADR listed in US,
you can go to this website:

http://www.adrbny.com/dr_directory.jsp

I hope that helps.