How many goods are suitable for FCL sea shipment？

Do you know when it is most economical to shipping from China to USA by FCL ocean freight ?
International shipping is divided into LCL and FCL. LCL means that the carrier (or agent) receives less than a full container of goods, and then classifies the goods according to the nature and destination of the goods, and the category of goods. Goods shipped to the same destination are packed in boxes in a certain quantity.