The US has imposed more sanctions on North Korea as well as Chinese firms that trade it in a bid to convince Pyongyang to abandon its missile and nuclear weapons programmes.
The US Treasury unveiled sanctions on one Chinese individual, 13 entities that included four Chinese trading companies and 20 cargo ships it says are helping North Korea evade UN sanctions, reports London's Financial Times.
US Treasury secretary Steven Mnuchin the US was "steadfast in our determination to maximise economic pressure to isolate it from outside sources of trade and revenue".
The so-called secondary sanctions on Chinese companies were imposed on Dandong Kehua Economy and Trade, Dandong Xianghe Trading and Dandong Hongda Trade.
The US Treasury said the firms exported $650 million worth of goods to North Korea from 2013 until the end of August this year. China criticised the move, which comes less than two weeks after Donald Trump visited Xi Jinping.
