There have been many groups who, throughout history, have not welcomed the process of cultural diffusion. For hundreds of years, both China and Japan did not allow foreigners to enter their countries, they also did not allow trade with outside countries. These countries limited their interactions with other cultures well into the twentieth century. Both China and Japan were concerned that their cultures would be weakened by the introduction of ideas from other cultures. China had an ethnocentric view, they believed that no other culture was worth coming into contact with since China believed itself to be the best culture in the world. With the inventions of such things as the computer and the Internet, these countries have since allowed contact with other areas of the world to occur and have welcomed cultural diffusion.