It is mainly produced in Xiuhui, Diao town of Zhangqiu. It is called “onion king”, because it is 1.5 meter high and the stalk is 50 to 60 centimeter, with 2 to 5 centimeter stem diameter and one Jin weight. It characterizes by long and thick stem, large and tender stalk, light pungent odor, and a little of sweet flavor. So it is the fancy food to people of Shandong.