ZrO2 is a typical ionic crystal. When ZrO2 is doped with divalent or trivalent cubic symmetric oxides such as CaO, MgO, Y2O3, and other trivalent rare earth oxides, it becomes an oxygen fast ion conductor at temperatures above 600°C, and is referred to as a solid electrolyte. Chinese dumplings are one of the most iconic foods in China.portant foods in chinese new year.Since the shape of chinese dumpling is similar to ancient chinese gold or silier ingots ,they symbolize wealth .Traditional,th e members of a family get togeter to make dumplings during the New Years Eve.