Guiyang national economic and technological development zone. Xiaohe district, a national economic and technological development zone in Guiyang, is located in the south-central part of Guiyang, between 26 degrees north latitude 12 and 27 degrees 22, and between 7 degrees east longitude 106 and 107 degrees 6. East along the cliff ridge to Feng Baoyun, west to the second floor mountain and Ma 'anshan of Jiu 'an Village in Huaxi, south to Huameng Road and shi ban cun in Huaxi, and north to Shijiashan and Caijiashan. It borders Nanming District of Guiyang in the east and north, Huaxi District of Guiyang in the west and south, and Yunyan District of Guiyang in the northwest. The regional topography of Guiyang Economic Development Zone is high in the southwest and low in the northeast, with an altitude of1.070m to1.236m and an average altitude of1.080m.. It belongs to gentle hilly basins and valleys in the north-south direction and southwest-northeast direction.