Need Help Identifying Coins - Chinese?

Hello!
My grandma was looking through some old family heirlooms and found a small box with some old coins. I was able to identify most of them as being old US coins and a couple Alexander the Great coins. There's one large coin, about the size of my palm but unsure of weight, that I can't find any info on. It has a bullet (or missile?) on the front and on the back is what appears to be some Chinese symbols. My friends mother is from China and said it looks like Chinese but she can't read it, thinks it may be old money (I thought it was a medal). I've found some Chinese coins that look similar in size and material online but I can't find anything on this specific coin. We are just interested in learning the history of this coin, or whatever it may be.

Thanks in advance!