4 10205。 According to the postcode database, the postcode of Changsha High-tech Zone is 4 10205. Changsha, also known as Xingcheng, is a prefecture-level city, provincial capital and megacity under the jurisdiction of Hunan Province, an important central city in the middle reaches of the Yangtze River, and a central city of the Changsha-Zhuzhou-Xiangtan urban agglomeration approved by the State Council. Located in the central part of China, north of the eastern part of Hunan Province, it has a subtropical monsoon climate.