Chinese state-owned giant PetroChina, which hasn’t bought Venezuelan crude since the U.S. imposed sanctions on Venezuela in 2019, is not too keen to start buying again after the U.S. authorized global traders to market the crude from the world’s biggest reserves holder. PetroChina has told traders not to buy or trade Venezuela’s oil—a trade that is now under U.S. control after the capture of Nicolas Maduro, trading sources with knowledge of the matter told Reuters on Tuesday. The Chinese oil and gas giant stopped…