China shipping to Singapore basic cost is FOB, the entire cost of shipping from supplier address to consignee address included several steps, each step have cost, these are export haulage truck,  export customs declaration, export local surcharges, sea shipping, import port PSA cost, import customs declaration cost, destination delivery cost.

FOB price to consignee is only sea freight, to exporter is export surcharges, buyer and seller who handle who is response to the work and relevant cost

CIF sea freight equals FOB sea freight plus export haulage and customs declaration cost, the cost should be confirmed by real packing list and invoice reviewed

DDU/DDP sea freight price equals CIF price plus destination import customs cost and delivery cost