By Paul Carsten, Anna Hirtenstein, Lucy Craymer and Gleb Stolyarov
LAST Christmas, the tanker Yug cruised out of the Chinese port of Qingdao after offloading 2 million barrels of sanctioned Iranian oil.
Near the Arctic, a vessel carrying Russian crude churned through icy seas, bound for India. Six thousand miles away, a third ship unloaded its cargo of Iranian oil off the coast of Malaysia.










