An old saying is that Toronto and McGill are way easier to get admitted to compared to Harvard, but if admitted might not be any easier to graduate from.
I know or have known multiple people who got a bachelor’s degree in Canada, and then got some form of graduate degree (usually either master’s or PhD or both) in the US. This does include students who got their graduate degree at either Stanford or Princeton (and U. of Washington and probably somewhere else). Apparently if you are able to get high grades at the Canadian schools then admissions in the US understands how hard this was. Whether this also applies to employers in China I would not know.