You uploaded three photographs (by mistake I assume), all of the bottom. I removed two.
This doesn't seem to be a Chinese character. Looks like the drawing of some bird to me. Anyway, occasionally Chinese ceramics do have such markings on the bottom, written in black ink, but they are not marks made during production.
On another note, with Chinese ceramics it is impossible to tell the age, etc. from a mark alone, because many ceramics show marks of earlier eras. The mark is the last thing to look at. A picture of the whole item and some close-up details is more helpful, usually in deciding what it might be.
