Yantai Jereh Oilfield Service Group Co., Ltd. was founded in 1999 and was transformed to a company limited by shares on 22 November 2007, with its headquarters located in Yantai City, Shandong Province. And in February 2010, Jereh (stock code 002353) was listed on the SME board in Shenzhen Stock Exchange.

Dezhou United Petroleum Technology Corp. is situated in Dezhou, Shandong, which was founded in 1961, formerly a wholly-owned subsidiary of Sinopec Star Co., Ltd. It was restructured as an ESO(Employee Stock Ownership) limited liability company in 2004, and changed its name to Dezhou United Petroleum Technology Corp. on June 9 2017.

Shandong Jerei Digital Technology Co., Ltd. is an industrial Internet company specializing in the concept of digital twins. Relying on the Vlicode cloud platform and digital centers as the carrier, with the wind of digital twins and the industrial Internet under our wings, we support the digital transformation of enterprises and empower the digital transformation of the manufacturing industry from the three aspects of digital marketing, digital production, and digital management and control.