On September 9, the ex factory price of BR, the main domestic supplier of BR, was temporarily stable. Since the supplier raised the price of BR at the beginning of September, only PetroChina Northeast Company raised the ex factory price of BR again in late September, and the rest was basically stable. As the international crude oil price rises sharply during the National Day, the BR industry chain may be under pressure from energy, and the ex factory price in October is expected to be adjusted.