In two words, Marco Polo.
This was a teenaged Venetian who travelled with his father an uncle to Kublai Khan's China. When he returned to Venice in his middle age, he brought back Chinese "apps" in paper currency, astronomy and navigation that helped the Venetians and others in their naval and trading endeavors, as well as more accurate maps of the land routes between Europe and China. Polo is sometimes credited with bringing back cultural influences, such as Chinese noodles for Italian spaghetti, but that is less well documented.
Kublai Khan also founded the Yuan Dynasty, which lasted nearly 100 years, and ruled over it for its first twenty-odd most peaceful and profitable years. During his reign, he improved ship and canal building, and trade generally, particularly internal trade. The art of ceramics (porcelain) also made a new high during the Yuan Dynasty.