
The inscription is
jiao yi (交æ˜") which translates as "business transactions" or "trade".
(Unfortunately, the software on this forum does not display certain Chinese characters.)
The complete inscription (front & back) therefore means "fair and honest in business transactions".

The inscription reads
xian feng tong bao (å'¸ä¸°e€šå®�) which was used on coins of the
Xianfeng Emperor.
However, the reverse side of the piece has the name of the mint (Suzhou) written in Chinese (Han) characters. Coins of this emperor had the mint names written in Manchu.
Therefore, this piece is not an altered coin but was cast in this shape to be a charm. For reasons I do not know, charms like this frequently use the name of the Suzhou mint.
Gary