roducing areas of the Chinese onion, located in east longitude, latitude 39 10 '39 59', altitude 1340 m to 2200 m. District heat and abundant sunshine, the annual sunshine time is 3033 - 3317 hours, temperature, light quality, abundant solar energy resources. The annual average temperature of 5-8 C, frost-free period of 140-160 days, annual precipitation is 50-200 mm. The production of onion is good quality, high dry matter content, are exported to Russia, Japan, Korea and Southeast Asian mar