The National Development and Reform Commission of the People's Republic of China (NDRC)

  • companies to report on their use of imported crude oil over the past few years
  • NDRC focus on resales and tolling schemes
  • The urgent notice issued to Sinopec Group, China National Offshore Oil Corporation (CNOOC), Sinochem Group, ChemChina, and China North Industries Group

Info via Reuters, citing unnamed sources.

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Hard to not see this as part of China's current examination of commodity price surges.