1.瞒天过海　Cross the sea under camouflage. 

2.围魏救赵　Relieve the state of Zhao by besieging the state of Wei. 

3.借刀杀人　Kill someone with a borrowed knife. 

4.以逸待劳　Wait for the exhausted enemy at one's ease. 

5.趁火打劫　Loot a burning house. 

6.声东击西　Clamour in the east, attack in the west. 

7.无中生有　Create something out of nothing.

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