... has becomed one of four countries having large onion production(China,India,the United States and Japan).Onion classify1.Red ... 4. Treat diabetes Onion baseThe main planting area of China include Inner Mongolia,Shandong,Gansu,Xinjiang,Jilin,Heilongjiang,Sichuan,Yunnan ... head generally small,export restrictions.But because of the harvest time,China's other origin of Onions have not listed,Fujian onion ...