Lankao, a county under the jurisdiction of Kaifeng City, Henan Province, is located at the last bend of the Jiuqu Yellow River, with a total area of116 square kilometers. By 0: 00 in 2020, the permanent population of lankao county will be 77,278. It is an important part of the "half-hour traffic circle" in "one pole, two circles and three floors" in Henan Province. Lankao county was a Huzhen town in the Spring and Autumn Period, and Jiyang County in the Qin Dynasty was located in the north of the county, which was the beginning of lankao county. In 5 BC, Liu Xiusheng, Emperor Guangwu of Han Dynasty, was born in Jiyang Palace in the north of the county. In 9 years, Donghun County was changed to Dongming County. 12 18, Dongming County was abandoned as Tonganbao, and Xinxian County moved to the former site of Ju Yuan County, north of the Yellow River. 1232, the southern part of the Yellow River is divided into Yanglan County and Yifeng County. 1In March, 783, the county seat of Kaocheng County was moved to lankao county for the first time. 1825, Yifeng county was merged into Yanglan county, called Lanyi county, and Yifeng county was placed under the township. 1909, in order to avoid Emperor Puyi, Lanyi County was changed to Lanfeng County. 1June, 954, Lanfeng County merged with the western part of Kaocheng County and was named lankao county after the initials of the two counties.
Lankao is the hometown of Paulownia, a national garden county, a national health county, a national civilized city, a provincial ecological county, a national double-support model county, a national new urbanization pilot county, the first batch of national ecological protection and construction demonstration zones, a national social credit system construction comprehensive demonstration pilot county, the first national inclusive finance reform pilot zone, and a county-level new urbanization demonstration county.