1 General Lü Meng 呂蒙|吕蒙 of the southern state of Wu (idiom); model of self-improvement by diligent study (from unlettered soldier to top strategist of Wu)
围魏救赵
wéi Wèi jiù Zhào
1 lit. to besiege 魏[Wèi] and rescue 趙|赵[Zhào] (idiom)
2 fig. to relieve a besieged ally by attacking the home base of the besiegers
封沙育林
fēng shā yù lín
1 to plant trees in order to stabilize sand (idiom)