According to the national Code for Winter Construction of Building Engineering, winter construction will be started when the daily average outdoor temperature keeps below 5℃ for five consecutive days.
Aba Prefecture is an autonomous prefecture in Sichuan Province, China. It is located at the southeast edge of the Qinghai-Tibet Plateau, at the junction of the northern end of Hengduan Mountains and the alpine valley in northwest Sichuan. The landforms are mainly plateaus and alpine valleys. It is rich in natural resources and unique national culture, and its economy is dominated by tourism.