In 1987, Shandong Zhongji Electrical Equipment was founded originally in Longkou as a machinery manufacturing factory.

It was one of the earliest companies in China to independently develop and manufacture CNC machines for motor winding.

[2] In April 2012, Shandong Zhongji Electrical Equipment held its initial public offering (IPO) becoming a listed company on the Shenzhen Stock Exchange.

Investors of the firm included Google Capital, Lightspeed Venture Partners and Oriza Holdings who chose to invest in it due to its importance to data centers.

[3][4][7] In February 2020, Zhongji InnoLight acquired Chengdu Tsuhan Science & Technology, a provider of optical components and transceivers.