I have not seen this particular shape of porcelain before which may be used on an alter or a table to hold food of some sort. The Yongzheng mark is poorly done. The decoration is not that great either. So I agree with Peter most likely this is a modern reproduction. It certainly is not of imperial kiln quality.
Nov 30, 2011
Chinese porcelain by: peter
There is a Yongzheng reign mark. I would be interested to learn what this is. Personally I think it is a modern creation.