12 January 2018 11:16 p
China's imports from North Korea dropped 33%.
In November, China's exports to North Korea stopped , and the world's second-largest economy said it had not imported any shipments of iron, coal or lead from North Korea.
The trade balance surplus for the world's second-largest economy hit 2.87 trillion yuan ($ 422.5 billion) in 2017.
South Korea and Japan have asked China to put more pressure on North Korea to end its nuclear and ballistic programs.
North Korea faces international sanctions on its exports, in response to missile and nuclear tests conducted by the isolated state.
Last month, the Security Council imposed new sanctions on trade with North Korea, including cutting shipments of oil products to 500,000 barrels a year.
By 8:10 am (GMT), the yuan was up 0.5 percent at $ 6.4740.