Hi kataa,
I'm not too familiar with Chinese coins but I believe that this is probably a form of fantasy coin (probably a fengshui token).
On the obverse, the words written are 通宝 (horizontally) and 嘉庆 (vertically). This emperor ruled over China in the early 19th century. Here's an article more about him. 通宝 means something like circulating currency.
https://en.wikipedia.org/wiki/Jiaqing_Emperor
On the reverse, the words written are 百子千孙。 It literally translates to hundreds of sons and thousands of grandchildren. During the Qing dynasty, the reverse of coins are usually traditional Mongol characters, which I believe is probably the name of the emperor in Mongol script.
Hence, I believe that this is a fantasy coin.