What is the most largest accomplishments in the Ming Dynasty?

1. Architecture: there are many great buildings built during Ming and the Forbidden City is the most well-known one.
2. Great Wall: the best preserved sections of Great Wall today were made then.
3. The Yongle Canon was made during the throne of Emperor Zhu Di. It is the largest encyclopaedia in the world.
4. Zheng He's Expedition enlarged the influence of China and improved the international trade of China.