2010. The first generation intelligent cylinder valve was born in POLYGON's subsidiary company Hangzhou Liqi LPG Equipment Co., Ltd.
![Development history]( "Development history")
2013. POLYGON found the second subsidiary company Polygon (Beijing) Information Technology Co., Ltd. And Internet of Things (IoT) management system came into operation.
![Development history]( "Development history")
2017. POLYGON finish the IPO and became a listed company in China with Stock Code 870802.
![Development history]( "Development history")