Answer:
1. Extension of the Grand Canal
2. Improvement of the Mongolian postal services
3. Refinements in science
Explanation:
Kublai Khan was a grandchild of Genghis Khan and was notable for his many victories in wars. He ruled over the Yuan Dynasty which was a Chinese province and he situated his capital in where is today known as Beijing. He made foreign appointees superior to the Chinese.
While he ruled, over the Chinese, he made significant improvements in several spheres some of which include the refinements in science. Maps were improved upon and standardized. The Grand Canal was also extended and the postal services were made more efficient. Kublai Khan made several other policies while he ruled.
