The United States imports large quantities of waste oil from China for the production of advanced biofuels, including biodiesel and sustainable aviation fuels, which can be widely used in automobiles, ocean-going ships and aviation to replace fossil fuels such as oil and natural gas.。In recent years, European and American countries have actively promoted the development of advanced biofuel industries and have formulated relevant policies and targets.。China is an important producer and exporter of biodiesel in the world, with an annual output of more than 2 million tons, but 90% of which is exported because the domestic market demand has not yet formed a scale.。China has a certain production capacity in terms of sustainable aviation fuel, but the supply and demand market is still in the early stages of development.。