I think a lot of nations are getting sick of the USA telling them who they can buy what from. Oil is a world commodity. If China or anyone else can get a good deal on the price why not buy it from Iran? The free market champs should be howling about this.
Back during the Carter presidency there was an embargo on Iranian oil. When it was over investigation revealed Israel had been secretly buying Iranian oil which surprised no commodity trader, least of all Marc Rich and Glencore. Hell John Fredricksen of Frontline and Seadrill fame made his fortune running oil for Iran. He was the Ayatollah’s lifeline.