Jiaolai Plain () is a plain located in the south central part of Shandong Province between the middle hills (ä¸Âå±±ä¸Âéµ) and low hills (ä½Âå±±ä¸Âéµ) and the low hills of Jiaodong. Its southern and northern tips are surrounded by Jiaozhou Bay and Laizhou Bay repectively.
Jiaolai Plain is mainly formed by the alluvial flow of rivers such as Huai River, Bailang River (ç½浪河), Jiaolai River (è¶è±河) and Dagu River. Its average elevation is around 50 meters. The plain mainly includes most of Weifang and the northern part of Qingdao.
Jialai Plain is one of the major arable land concentration areas in Shandong. According to modern geographical studies, the plain was flooded by seawater for a long time more than 4,000 years ago.