Coastal cargo ships are primarily used for cargo transportation between coastal areas, offshore regions, and islands worldwide, covering coastal port routes in Southeast Asia, South Asia, South America, Africa, and the Mediterranean; Major vessel types include bulk carriers, container ships, oil tankers, chemical tankers, Ro-Ro ships, and multipurpose ships, with primary power requirements ranging from 500 kW to 4500 kW. Weichai's compatible engine models include the M series, 170 series, and WH series, with fuel types primarily being heavy oil and light diesel.