Jiaolai Plain

Jiaolai Plain (simplified Chinese: 胶莱平原; traditional Chinese: 膠萊平原; pinyin: Jiāolái píngyuán) is a plain located in the south central part of Shandong Province between the middle hills (中山丘陵) and low hills (低山丘陵) and the low hills of Jiaodong.^[3] Its southern and northern tips are surrounded by Jiaozhou Bay and Laizhou Bay repectively.^[4]

Jiaolai Plain

Lai Prefecture in 1820, roughly the extension of Jiaolai Pain
Chinese	胶莱平原
Country	China[1]
Altitude	Mostly about 50m[2]

Overview

Jiaolai Plain is mainly formed by the alluvial flow of rivers such as Huai River, Bailang River (白浪河), Jiaolai River (胶莱河) and Dagu River. ^[5] Its average elevation is around 50 meters. ^[6] The plain mainly includes most of Weifang and the northern part of Qingdao.^[7]

Jialai Plain is one of the major arable land concentration areas in Shandong.^[8] According to modern geographical studies, the plain was flooded by seawater for a long time more than 4,000 years ago.^[9]