A MASSIVE BARBED RIM LONGQUAN CELADON CHARGER MING DYNASTY, YONGLE PERIOD
a barbed everted rim of matching form, covered overall with an even, thick, lustrous yellowish-green glaze, save for the wide ring on the base fired brick-red
Please see this link,,. www.sothebys.com/en/catalogues/ecatalogue.html/2011/ceramics-myt-hk0377#/r=/en/ecat.fhtml.HK0377.html+r.m=/en/ecat.lot.HK0377.html/7/
More pictures with details would be required. An overall view of the dragon with details visible clearly, as well as some partial closeup shots of the glaze might help. The foot rim and shiny glaze make it impossible to be from the Song/Yuan dynasties. If you were thinking that it is Longquan, then that is close to impossible. The glaze and bottom of those celadons are different.