狗肺狼心

Explanation: With the "ungrateful." 　　Source: Opera "Fifteen Strings of Coppers," the second murder Shui woman, dog lung Langxin! " 　　Examples: Cells only for a group of traitorous Chinese, generated a dog lungs take Langxin, day and night to eat the poor, eat the wrong backing fever almost dark eyes. ★ Qu "Oriental people to send troops," one of the