Chinese cash coins. Here are a couple of references to help you find out: http://www.sportstune.com/chinese/coins/idpage.html http://www.calgarycoin.com/reference/china/china8.htm#chien lung
The side with four characters will help you determine the era, the side with two characters the mint. Based on the picture on the bottom, the top coin appears to be from the era of Emperor Gao Zong (1736-95) based on David Hartill's "Cast Chinese Coins". The Standard Catalog Of World Coins lists the same as under Kao Tsung, Reign title: Ch'ien-lung (Qianlong). https://en.numista.com/catalogue/index.php?r=china+1736-1795&p=1&x=20&y=8
They all have Manchurian writing on the back, so all of them are Qing. The top one is the emperor Qianlong (pronounced Chienlung). The one that the second one at the bottom of your hand in the photo with two is from the emperor Daoguang, who reigned from 1820-1851. As for the mints, on the photo with the three coins, the bottom left is in Yunnan province, and the bottom right is Kwangtung province. I can’t say about the third one because I haven’t seen its other side.
