Universality Of Islam
As Faisal sb replied, Islam was introduced as early as 1300 years ago. Not only this one there are others as well such as Mosque of Xian. it is also said that if ming dynasty would have stayed whole china would have been muslim. Hui chinese are indegionous people following Islam. Beside, any one can preach Islam if qualified. East asia was introcuced to Islam by mostly traders of Arabs and mystic so why there is a problem? If you have intrest, I will suggest you to read these books 1) Cambridge History of Islam The Indian Sub Continent Southeast Asia Africa and the Muslim West Volume 2 Part A https://libgen.me/item?id=475399&adblock=false 2)Islam and the Trade of Asia: A Colloquium http://libgen.gs/ads.php?md5=F77EDDA458C2FF6B307744B6D2C5FA25 3)Islam in Aisa http://libgen.gs/ads.php?md5=D16BFD918621F475C47E58D9043BE8B3