China’s trade with North Korea fell in October to $334.9 million, its lowest since February. Imports shrank to their weakest in years, data showed on Thursday, the latest sign that UN sanctions have crimped business between the neighbors. The total is down almost 20 percent from September and compares with $525.2 million a year ago, Reuters said, citing customs’ data. The world’s second-largest economy bought goods worth $90.75 million in October from North Korea, down sharply from $145.8 million in September. It is the lowest on government records going back to January 2014. Exports plunged to $244.2 million, compared with $266.4 million in September and $286.9 million in October last year.