“Marco, his father, and his uncle set out from Venice in 1271 and reached China in 1275. The Polos spent a total of 17 years in China”-Brittanica.com
Also they left…. “The Polo family, on that occasion, had expressed their regret at the long lack of a pope, because on their previous trip to China they had received a letter from Kublai Khan to the Pope, and had thus had to leave for China disappointed.”-Wikipedia.org