Persona non grata from Latin- an unwelcome person.
This term is usually used in diplomacy, when due to some criminal/political actions a person is prohibited to enter a country. For example if a member of diplomatic mission is caught carrying out espionage missions he can be labeled "persona non grata", forced to leave a country and cannot return.
Persona non grata can also be used in less formal situation, when someone is not welcome in society/community due to his behavior.
Jean might see that people in China look different and there is different cultural exercises. I think it would be the same if someone were to go from France to China, but there is more diversity among the world, so we could see people from China, Asia, Africa, Mexico and more. So its more common.
And they might call Jean a foreign devil because they are going to another country and leaving their own country.
His point of view is thinking of Jean as a traitor for leaving his country, but Jean might just be trying to learn form others and explore.
Hope this helps!!
Numerous is plenty
pedestrian is walker
liberty is freedom
enumerate is restate
pedal is foot bar
liberal is generous
