Is this CoreESIM plan valid for the Trans-Mongolian Railway journey through Russia or China?

This specific CoreESIM data plan is provisioned for use solely within Mongolia's geographic borders. The iconic Trans-Mongolian Railway traverses three distinct countries: Russia, Mongolia, and China. Upon crossing the international border into Russian Siberia or Chinese Inner Mongolia, your CoreESIM's data service will terminate. For continuous connectivity throughout the entire Trans-Mongolian route, CoreESIM recommends a multi-country or regional eSIM solution.