Crude oil exports from Iran hit the highest level in six years during the first quarter of the year, data from Vortexa cited by the Financial Times has shown. The daily average over the period stood at 1.56 million barrels, almost all of which was sent to China, earning Tehran some $35 billion. “The Iranians have mastered the art of sanctions circumvention,” Fernando Ferreira, head of geopolitical risk service at Rapidan Energy Group, told the FT. “If the Biden administration is really going to have an impact, it has…