RCS is the refrigerated consumption surcharge in ocean shipping, and its full English name is RCS: Reefer Consumption Surcharge, which is usually used on refrigerators. Ocean shipping is broadly defined as all business activities related to the sea. But up to now, when we mention ocean shipping, we generally mean maritime transportation, such as bulk cargo transportation, container transportation and other port-to-port ocean transportation. However, with the development of the shipping Internet, especially the recent development of Internet giants such as Aichuan.com and Alibaba, the definition of ocean shipping in the future may run through land and sea, and is expected to develop into a door-to-door ocean and land transportation integrated transportation industry.