open-door policy

Từ điển Việt Anh Việt 4in1 - English Vietnamese 4 in 1 Dictionary

ˌopen-ˈdoor ˌpolicy BrE AmE noun [countable]
1. the principle of allowing people and goods to move into a country freely:
They’re pushing forward economic reform and an open-door policy.
2. the principle of allowing anyone to come to a place at any time, for example in order to discuss something