Situated in the central part of China along the middle and lower reaches of the Yellow River, Henan Province is the cradle of the nation and one of the birthplaces of traditional Chinese culture. It is also an important producer of energy resources, raw materials and agricultural and sideline products in China. The average annual temperature in the province is about 13 degrees to 15 degrees Celsuis, the total amount of sunshine in a year is 2000-2600 hours, and the frostless period lasts
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