I am trapped between my parents and girlfriend. What should I do?

I am in a relationship for a while (9 months) with a foreign girl (shall not name the nationality here). We have not encountered any teething issues with each other, but the problem I am facing now is the "resistance" from my parents.

When they know about my relationship with a foreign girl, they totally opposed this relationship.

I am at a loss and do not know how to proceed on both fronts (my parents and my gf). Have any encountered this before? Any advice please?

Thank you.