At present, the loading and unloading fee for loading and unloading coal at the wharf is per ton 18.5 yuan, and miscellaneous fees (waste oil recovery, food supply, water addition, tugboat, mooring fee, pilotage, etc. ) A Panamanian ship costs about 30,000 yuan, which is generally free of storage fees. In this way, the port can earn about 2 billion yuan per ton of coal.