Which Mongol leader built enormous ships and welcomed traders to ports bringing people from all parts of the world providing China with notable economic progress?

The Mongol leader who built enormous ships and welcomed traders to ports, facilitating China's economic growth was Kublai Khan. Kublai Khan was a grandson of Genghis Khan and the founder of the Yuan Dynasty in China. He ruled from 1260 to 1294.

During his reign, Kublai Khan established a vast trading network that connected China with many parts of the world. He built several ports, including the famous Quanzhou port, which became a hub for international trade. Kublai Khan also encouraged foreign merchants to come to China and welcomed them with open arms.

As a result of these policies, China experienced a period of significant economic growth and prosperity during Kublai Khan's rule. The influx of traders from all over the world brought new goods, ideas, and technologies to China, which contributed to the country's development and advancement.

Kublai Khan also ordered the construction of large ships called "treasure ships" which were some of the largest wooden ships ever built. These ships were used for trade and exploration and helped to expand China's reach into the wider world.