The high speed engines, like WP4, WP6, WD10, WD12, WP12 and M26 are mainly applied on the high speed boats and yachts, passenger ships, fishing boats and official boats as main engine or auxiliary engine in offshore market. The middle speed engines, 160 and 170 are mainly applied on carriers, engineering vessels, passenger ships as main engine or auxiliary engine. The middle speed engines, CW200 and 250 are mainly applied on engineering vessels, passenger ships, fishing boats and bulk carriers as main engine or auxiliary engine. MAN engines, L16/24、L21/31、L27/38、L32/40and V32/40 are mainly applied on the bulk carriers, engineering vessels and multipurpose vessels and marine traffic control ships as main engine, electric propulsion engine or auxiliary engine.