mainline shipping provider china typically refers to major shipping companies operating regular, long-distance container routes to and from China. These providers, such as Maersk, MSC, COSCO, and CMA CGM, run fixed schedules between Chinese ports and international destinations across the globe. Mainline services are essential for high-volume trade, ensuring that containers are transported efficiently via ultra-large container vessels. Chinese manufacturers, traders, and freight forwarders depend on these shipping lines to maintain steady supply chains and reduce logistics risks in international commerce.