Regionalism

Rich area

Richer area

May using area

Deficient area

Year radiation
Kj/CM2Year

≥580

500-580

420-500

≤420

sunshine hours h per year

≥3000H

2400-3000H

1600-2400H

≤1600

Region

West Inner Mongolia, Xinjiang south west Gansu, Qinghai-Tibet Plain

North east Xinjiang, Northeast, Inner Mongolia, North China, North Shanxi, Ningxia, Gansu part, Qinghai-Tibet Plain east side, Hainan, Taiwan

Northmost part Northeast, Inner Mongolia Hulunpeierh league, Yangtze River downstream, Guangdong and Guangxi, Fujian, Guizhou part, Yunnan, Henan, Shanxi

Chongqing, Sichuan, Guizhou, Guangxi jiangxi, some areas

Characteristic

Sunshine hours≥3300 hours
Year sunshine percentage≥0.75

Sunshine hours2600-3300 hours
Year sunshine percentage≥0.6-0.75

Solar energy rich area to deficient area excessive belt

Sunshine hours≤1800 hoursYear sunshine percentage≤0.4The area suggestion does not use the solar energy

Continuously cloudy rainy day

2

3

7

5