紅旗

Noun

 * 1) red flag; red banner
 * 2)  advancement
 * 3)  a red banner used by the police: "Stop Charging or We Use Force / "
 * 1)  a red banner used by the police: "Stop Charging or We Use Force / "

Usage notes

 * In ancient times, red banners were used by military units. In Hong Kong, red flags are erected when there are dangers nearby.