Who bulit the forbidden city, how long did it take to buld?

The forbidden city was bulit in 1406-1410. The person who bulit it was Kubal Kuhn. Well, he was the main person. There was 93 houses. Also there was 9,999 bulidings. As i said before after this was built the Ming Dynasty and the Qing Dynasty. For about 100 years they ruled. We dont know why  Kubal Kuhn bulit this city.