This (Chinese) Chess has a new piece, Dragon.

Dragons move like the Bishop in Western Chess, and also slide orthogonally along the river without capture.
Dragons can appear when the General moves, and can disappear when they are in a same square.

Rules and strategy can be found at http://www.newchess.com.cn/newchess/NEWCHESS.HTM (in Chinese) or translated by Google (in English).