密切 (mì qiè) means “close; familiar; intimate; closely (related); to foster close ties; to pay close attention”. It is an HSK 5 Chinese word in the HSK 3.0 vocabulary.
两国保持着密切的联系。
Liǎng guó bǎochízhe mìqiè de liánxì.
The two countries maintain close contact.
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