The leaping carp together with the dragon was used as to wish luck in Imperial examinations. The carp struggles, swimming up-stream, eventually reaching it’s goal of passing through the Dragon Gate.
Apocryphal marks are frequently encountered on Kangxi Blue and White Porcelain, the mark of the Ming Emperor Chenghua who reigned from 1465 to 1487 being by far the most common, other Ming marks include Jiajing (1522-1566) and less frequently Wanli (1573-1620). These marks were not added to the piece to deceive, but more as a sign of reverence to earlier potters of the Ming dynasty (1368-1644). Occasionally they are used on pieces copying Ming Porcelain, these objects were probably made for collectors who could not afford the Ming original.