title: Yiyang High-Tech Industrial Development Zone
text: # Yiyang High-Tech Industrial Development Zone
  
  Yiyang High-Tech Industrial Development Zone (Chinese: 益阳高新技术产业开发区; abbr: YYHTZ) is a national high-tech industrial zone in Yiyang, Hunan, China. Its area is 42-square-kilometre (16 sq mi). It traces its origins to the former "Chaoyang Economic Development Zone" (朝阳经济开发区), founded in 1994. It was renamed to the present name, meanwhile the zone was upgraded to one of first batch of provincial HTZs. In 2011, it became a national HTZs approved by the State Council of China. Its four major industries are new materials, new energy, advanced manufacturing and biomedicine.
  
  