YOU SAID:
An American visiting China is a foreigner.
INTO JAPANESE
中国を訪問するアメリカ人は外国人である。
BACK INTO ENGLISH
Americans visiting China are foreigners.
INTO JAPANESE
中国を訪れるアメリカ人は外国人だ。
BACK INTO ENGLISH
Americans visiting China are foreigners.
That didn't even make that much sense in English.