The sangwon bank is the industry's leading provider of smart skateboard bottoms and low- and medium-speed unmanned solutions, relying on self-study of line-controlled core components, smart skateboard bottom-board integration techniques and the capability of functional unmanned vehicle size mass production to build complete closed loops from bottom-up technology to commercial landings, with the l4 unmanned driver cumulating over 60 million kilometres and remaining in the first step of the industry。