ReadWriteQuiz
Chinese dictionary
n.derogmetabanner; flag; excuse; pretext (often for doing something bad)
打旗号让火车停下来
flag down a train
打着爱国主义的旗号
unfurl the banner of patriotism
打出旗号传达命令
flag an order
政府是在对贫穷开战的旗号下上台的。
The government came to power under the banner of fighting poverty.