The mark is a spurious Qianlong reign mark. Such marks were copied in later times ever since the Qianlong reign and cannot be used for dating. Chinese marks are judged by a number of factors (see age signs, etc.), and the mark is the last looked at for the reason mentioned above.
In this case, the type of the mark is not congruent with Qianlong marks and on antique Chinese porcelain the mark is usually in the center of the bottom. It is therefore likely that it is a 20th century copy. Looks like a famille rose item...
It is recommended to upload more pictures, including one or two closeups of the decoration, and of the bottom/foot rim. Additional pictures can be added via a new submission.