China is one of the first countries in the world to make canoes and use canoes and paddles to cross the sea. A canoe is the simplest boat. The log is hollowed out and people sit on it. It evolved from a raft.

Although this evolution process is extremely slow, it has taken an important step in the history of ship technology development. Canoes need more advanced production tools and are manufactured according to certain technological processes. Manufacturing technology is much more difficult than raft, and its own technology is much more advanced than raft. It already has a prototype of a ship.

In China, there were wooden boats with cabins in Shang Dynasty, and the shipbuilding technology in Han Dynasty was more advanced. Besides paddles, there are anchors and rudders on board.

In the Tang Dynasty, Colliers invented the use of wheels instead of paddles and paddles, and paddles.

Compasses were widely used on ships in the Song Dynasty, with watertight compartments to avoid sinking on rocks. There are also large ships with masts 10 and sails 10.

/kloc-In the 5th century, China's sailboats have become the largest, strongest and most seaworthy ships in the world. The progress of ancient navigation and shipbuilding technology in China is in a leading position in the world.