Your picture shows the reverse or back side of the coin. The Chinese characters above the "One Dollar" says One Yuan. The obverse of the coin probably has only Chinese characters and will tell the date and other info. Probably a forgery, most are. Metal content is always suspect even on the "real" ones. Often they have some silver content but not to much. Most grading organizations will not grade the coins as there are so many different varieties and there were many variations among even the legit ones. And to top that off, when the coins were changed corrupt government officials often didn't destroy the dies, they sold them.
But they are nice anyway. Clean it up with toothpaste and a toothbrush. Most clean up well. It is not unheard of for Chinese forgers to use toxic chemicals to make coins look older.