In the futures market, if the spot price is lower than the futures price, the basis is negative, and the forward futures price is higher than the recent futures price. This situation is called "futures premium", also known as "spot premium", and the part where the forward futures price exceeds the recent futures price is called "futures premium rate"; If the forward futures price is lower than the recent futures price and the spot price is higher than the futures price, the basis is positive, which is called "futures discount" or "spot premium". The part where the forward futures price is lower than the recent futures price is called "futures discount rate". When the freight forwarder quotes, the internal loading fee only includes the cost of lifting empty containers, packaging and heavy containers from the Phase II and Phase III docks or nearby yards. If empty containers are hoisted from other places, there will be empty container fees, and if they enter other docks, there will be port entry fees, which are collectively called short barge fees. Goods that need to be legally inspected for import and export must be legally inspected before the import and export declaration. This fee is called commodity inspection fee.