Qiánlóng niánjiān, Qīngcháo shíxíng bìguān-suǒguó de zhèngcè, zhǐ liú Guǎngzhōu yí ge kǒu'àn gēn wàiguó tōngshāng.
In the Qianlong era the Qing kept the country closed, leaving only the port of Guangzhou open for trade with foreigners.
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Said of the Qing rule that from 1757 confined Western trade to Guangzhou, and of Japan's 鎖国 (sakoku) under the Tokugawa shoguns. The opposite policy is 改革开放 "reform and opening up".
