What is the annual effective accumulated temperature of Fengjie climatic conditions?

Fengjie county belongs to subtropical humid monsoon climate, with early spring, hot summer, cool autumn and warm winter, four distinct seasons, long frost-free period, abundant rainfall and long sunshine time. The vertical climate is obvious. The annual average temperature below 600 meters above sea level is 16.4℃, 600- 1000 m, 16.4℃- 13.7℃,1000-1. The extreme maximum temperature is 39.8℃ and the extreme minimum temperature is -9.2℃. The frost-free period is 287 days on average, with annual average precipitation 1 132 mm and annual sunshine hours 1639 hours.