What is the difference between a typhoon and a tropical storm?

Tropical Depression (TD): maximum wind speed 10.8 ~ 17.1 meters/second, maximum wind speed near the bottom center of level 6-7;

Tropical Storm (TS): maximum wind speed 17.2 ~ 24.4 m/s, wind force 8-9;

Severe tropical storm (STS): maximum wind speed 24.5 ~ 32.6 m/s, wind force 10-11;

Typhoon (TY) : Maximum wind speed 32.7 ~ 41.4 m/s, wind strength 12-13;

Severe typhoon (STY): Maximum wind speed 41.5 ~ 50.9 m/s, wind strength 14-15;

Super typhoon: the maximum wind speed is more than 51.0 meters/second, and the wind force is more than 16 levels.