bì​guān​zì​shǒu

closed-door policy

Senses

闭关自守/ 閉關自守 bì​guān​zì​shǒu closed-door policy

to close a country's borders to international trade and diplomatic relations

闭关自守/ 閉關自守 bì​guān​zì​shǒu isolationism

to be conservative and resistant to new ideas or outside influences

References

antonym 闭关自守/閉關自守 门户开放/門戶開放