The open-door policy.

门户开放政策。

youdao

A great number of new words emerge into Chinese daily language with the Open-door policy, among which tech-words occupy a major place.

其中科技类词语随着科学技术的迅猛发展而不断壮大自己的队伍，在当代汉语中占有越来越重要的交际地位。

youdao

Since the reform and the open-door policy of China, the law consciousness of the Chinese citizens has gradually changed from the traditional type into the modern type.

当代中国公民法律意识变化的途径因年龄、文化程度、职业等方面的不同而显现出一定的差异和不平衡。

youdao

The open-door policy may have ended but it is an open question how effective the new labour-market controls will turn out to be.

ECONOMIST: Migration from eastern Europe

The ship runs on an open-door policy, to facilitate the work of the cleaning staff, but of course they can lock their rooms if they wish.

NEWYORKER: Stone Mattress

After decades of an open-door policy, the 1924 U.S. Immigration Act imposed quotas by nationality.

WSJ: A Tortuous Road to Refuge | Against the Odds | Museum of Jewish Heritage | By Julia M. Klein