A yellow or red sign sometimes appears in the upper right corner of Guangdong Satellite TV or Shenzhen Satellite TV. What does that mean?

That's an early warning signal of meteorological disasters. According to different signs, it can be divided into eleven categories, such as typhoon, rainstorm, high temperature, cold, fog, haze, strong wind, hail, lightning, drought and fire.

According to the severity and urgency of disasters, early warning signals are generally divided into four levels, representing general, heavy, serious and particularly serious meteorological disasters, which are marked with blue, yellow, orange and red in turn.

Red is the most urgent!