Founded in 1970, FGL Science and Technology Co , Ltd (short for FGI) is a national high-tech state-owned enterprise specializing in R&D, production, sales and service of frequency inverters, Static Var Generator, explosion-proof products (inverters SVGS), and energy storage products etc.

In 2021, FGI becomes the public listed company, and also it is the subsidiary of Shandong Energy Group, which is the world's top 500 company.

From 2021, FGI becomes the biggest manufacturer of high-voltage inverters and SVGS in China, with the 9 assembly lines, the annual production capacity is as high as 5000-8000 sets of high-voltage products.