How to use phone number from a different country for account validation?



I'm temporarily in China. My home computer at Russia. I'm trying to use TeamViewer to access it. TeamViewer asks me for my account validation using SMS, and suggests to use only Chinese phone number (+86). I don't have local sim card. I only have my native Russian phone number (+7).

So the question: how can I switch it to use my existing phone number for account validation???

Thank you, Alexandr