Zhangqiu District, Jinan City, Shandong Province. Green onions are generally on the market from March to May. Among them, Zhangqiu green onions produced in Zhangqiu District, Jinan City, Shandong Province are the main green onions on the market in March. As the "King of Onions", Zhangqiu Green Onions have a growing history of With a history of more than 2,600 years, Zhangqiu green onions are characterized by being tall, white and long, strong, crisp, tender and delicious, making them unique in the green onion market for many years.