Meaning of the Idiom
de long wang shu（to have insatiable desires）
During the Eastern Han Dynasty, after Wang Mang usurped the Han Dynasty and established a new dynasty, a man named Cen Peng served as a county magistrate in his hometown. Later, Liu Xiu raised troops hoping to rebuild the Han Dynasty, so Cen Peng led his troops to join him and was appointed as a general. He made a lot of contributions and won Liu Xiu’s trust and appreciation.
After Cen Peng followed Liu Xiu to conquer Tianshui, he besieged the rebel general Kui Xiao in Xicheng. At this time, Liu Xiu had to return to the capital Luoyang because of other important matters.
Before leaving, Liu Xiu left a letter telling Cen Peng: “After capturing Xicheng, you can directly attack Gongsun Shu in Xishu.”
The letter also said: “People’s hearts are always suffering from insatiability! After conquering Longxi, I look forward to marching into Western Shu!”
Later, Liu Xiuzhen eliminated Kui Xiao from Julong and Gongsun Shu from Shu, and restored the Han Dynasty regime.
The idiom “Delong Wangshu” evolved from here, and it is used to describe insatiable greed and unsatisfied.
得陇望蜀
[dé lǒng wàng shǔ]，原意是指已经取得陇右，还想攻取西蜀（陇：今甘肃一带；蜀：今四川一带），后成为讥讽人不知道满足、总想得到更多的意思。
出自《东观汉记·隗嚣传》。
例句
他们就是这样得陇望蜀，永远无法心满意足。
人家已尽了最大心力帮忙了，我们不好得陇望蜀，再提出别的要求。
人心不足蛇吞象，得陇望蜀的人最终结果是交不到好朋友。
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