Yiyang Group implemented the advanced 5S system (Methodology) in 2021.

The 30th anniversary celebration of Yiyang Group's establishment was successfully held in 2017;

The promotion meeting for the evaluation of "YEM-type Multi-purpose Slatted Fine Bubble Diffuser" hosted by China Urban Water Association was organized in 2017;

 Yiyang Group's large modern building, science and technology R&D center and product showroom were completed in 2011

The 20th anniversary celebration of Yiyang Group's establishment was a big success in 2007

The scientific and technological achievement appraisal of the new high-efficiency oxidation ditch rotary disc aerator hosted by the Ministry of Construction was organized in 2004;

Yixing Yiyang Mogen Materials Co., Ltd. was separately founded in 2002

It was relocated in urban area of Yixing in 2001;

 It was renamed Jiangsu Yiyang Water Industrial Co., Ltd. in 2000;

Jiangsu Yiyang Group was established in 1997;

It was renamed Yixing Water Industry Equipment Factory in 1992;

Yixing Gaocheng Wastewater Purification Equipment Factory - predecessor of Jiangsu Yiyang Group - was established in 1987;