〖In 1987 〗

The predecessor of DunAn Group - Zhuji Zhengxing Spring Factory was founded in Lishiwu Village, Diankou Town

〖In 1992〗

The Company entered the air-conditioning spare parts industry

〖In 1998〗

The Company entered the refrigeration equipment industry and Zhejiang DunAn Sanshang Electro-Mechanical Co., Ltd. was established

〖In 2001〗

The Company completed the shareholding reform and changed the name to Zhejiang DunAn Artificial Environment Co., LTD. In the same year, it cooperated with Zhejiang University, Xi’an Jiaotong University, and Hefei General Machinery Research Institute to es

〖In 2003〗

The Company cooperated with Zhejiang University to set up a post-doctoral mobile workstation

〖In 2004〗

DunAn Environment was listed in Shenzhen Stock Exchange with the stock code of 002011 and central air-conditioning as the main business

〖In 2006〗

The Company undertook the subject of National 11th Five-Year Plan for Science and Technology Support Plan: Research on key technologies of ai- source heat pump and achieved major breakthroughs

〖In 2007〗

DunAn Environment acquired the refrigeration accessories business from DunAn Hardware through private placement and completed the overall listing of refrigeration assets. In the same year, the central air-conditioning business turned from direct sales to

〖In 2008〗

DunAn Environment was reorganized and Zhejiang DunAn Electro-Mechanical Technology Co., Ltd. was established to be responsible for the manufacture and sales of air-conditioning equipment. Besides, a national post-doctoral workstation was set up. In the sa

〖In 2009〗

The Company successfully developed the world's first DEL nuclear-grade chiller. In the same year, the commercial air conditioners ascended to the centrifuge club

〖In 2010〗

The Company won the "China Standard Innovation Award"

〖In 2011〗

The Company passed the certification of State Administration of Work Safety and bacame one of two suppliers in China that truly possesses the general air conditioning package business for nuclear power stations.

〖In 2012〗

The Company obtained the general HVAC contract amounting to 155 million yuan of Tianwan Nuclear Power Station project. In the same year, DunAn Environment won the China Quality Award and DunAn Central Air-conditioning Lab passed the CNAS certification

〖In 2013〗

The air-conditioning export project of Chashma Nuclear Power Plant in Pakistan started to supply goods

〖In 2014〗

The Company introduced the international excellent expert teams and started the "qualitative leap" project to improve the product quality and services. In the same year, the COmpany signed a strategic cooperation agreement with Emerson on low-temperature

〖In 2015〗

The Company established an Expert Workstation of Zhejiang Academicians, passed the review of China Quality Award, and demonstrated the military air conditioners in "9.3 Big Parade"

〖In 2016〗

The Company successfully developed the magnetic levitation variable speed centrifugal chiller, variable speed screw chiller, free cooling air-cooled screw unit, and Magic S series combined air-conditioning unit. It also launched multi-split air-condition