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What was the name of the seventh century Syrian who was the first Nestorian missionary to China?
What is Alopen ?
Very little is known about Alopen, of course, but he is believed to have entered China in 635. A stone monument was discovered in 1625 that described the state of Nestorianism in China in the ninth century. (Incidentally, the other answers are also Nestorian missionaries to other countries, and they predate Alopen by hundreds of years.)