First "DunAn Cup" College Student HVAC Design Competition in 2018 Activity Time:to

Fourth "Master Cup" Product Application Design Competition of DunAn Central Air Conditioning Activity Time:2017-03-01to 2017-12-31

2016 Third Product Application Design Competition of DunAn Central Air Conditioning Activity Time:2016-01-11to 2017-01-11

2015 Second Product Application Design Competition of DunAn Central Air Conditioning Activity Time:2015-01-11to 2016-01-11

2013 First Product Application Design Competition of DunAn Central Air Conditioning Activity Time:2013-01-11to 2014-01-11