The Trump administration stepped up a pressure campaign against Venezuela’s oil exports by sanctioning companies based in Hong Kong and mainland China, along with related oil tankers it accused of evading restrictions. The US Treasury Department’s Office of Foreign Assets Control on Wednesday added four companies with links to Venezuela’s oil industry – Zhejiang-based Corniola and Hong Kong-based Aries Global Investment, Krape Myrtle Co and Winky International – to its specially designated...