Adora Magic City, China's first domestically made large cruise ship, has officially commenced the countdown to delivery and will be undocked in Shanghai soon. The cruise ship has a gross tonnage of 135,500 tonnes, 2,125 guest rooms and can carry more than 5,000 passengers. A series of experiments will be carried out to further verify the ship's center of mass and the function of lifeboats and portholes. What tests must a cruise ship pass before leaving the dock? Follow CGTN to witness the whole preparation process.