1. The Himalayas prevent cold Central Asian katabatic winds from blowing in, keeping the bulk of the Indian subcontinent warmer than most locations at similar latitudes.

2. The leading two mile chasers had clashed on six previous occasions and each time Katabatic had come out on top.

3. Due to the unique topography the wind of Nine Well area during the daytime is eastern anabatic wind and in the night is western katabatic wind in spring and summer.

4. For blower fan coil, adopting local drop ceiling when they are setting with new wind, but adopting a manner of katabatic wind when they arn't setting with new wind.

5. Such results are gotten:(1) Due to the unique topography the wind of Beijing area during the day time is southern anabatic wind and in the night is northern katabatic wind in summer.