What 2 things made it difficult for the europeans to trade with china

1. Traveling all the way to Asia was too difficult for most European traders.
2. In 1453, trade with Asia suddenly stopped. The Turks, a group of people from the Ottoman Empire, captured the city of Constantinople and took control of the Middle East. This closed the trade routes between Europe and Asia.
         
       Hope this helped ya'll! Because I did a little bit of research! :-)