1997

JH company was founded

2004

Started the development of ventilation products

2008

Being engaged in exporting business by ourselves

2009

Became the supplier of a well-known Italian elevator brand

2010

Successfully developed a complete set of iris dampers

2011

Became a supplier of MI company in the top 235 in the United States

2012

Aier company was founded

2013

To be one of the largest manufacturers of ventilation products in Ningbo

2015

Plant expansion,fully recommend lean production

2016

To be one of the largest suppliers of ventilation accessories in Europe

2020

Successfully developed fresh air equipment and obtained a number of technical patents

2021

To be the formal supplier of Haier

2022

To be the formal supplier of Hisense