Chinese junks were some of the most technologically advanced ships of their time. These multiple-deck ships could carry up to

50
people at a time. They also used
watertight compartments
to keep from sinking. These innovations enabled junks to contribute greatly to China's prosperity during the Tang and Song dynasties.

One of the key technological advancements of Chinese junks was their multiple-deck structure. Unlike many other ships of the time, Chinese junks had multiple levels or decks, providing more space for passengers, cargo, and supplies. This allowed junks to carry a significant number of people, up to around 50 individuals, at a single voyage. The spacious design made junks suitable for long-distance travel, exploration, and trade.

Another important technology employed by junks was the use of watertight compartments. These compartments were essentially separate sections within the ship that could be sealed off in case of damage or leakage. By dividing the ship into compartments, even if one section was breached, the rest of the compartments remained secure and the ship was less likely to sink. This feature greatly increased the safety and reliability of Chinese junks, particularly during rough weather or maritime accidents.

The technological advancements of multiple decks and watertight compartments were integral in the success and prosperity of Chinese junks, particularly during the Tang and Song dynasties. These innovations facilitated extensive maritime trade and exploration, allowing China to establish trade networks and diplomatic relations with various regions of Asia, Africa, and the Middle East. The junks played a crucial role in expanding China's influence, wealth, and cultural exchange during this period.