Responsible for the overall strategic development, and leading the business development of the Group He was appointed as Director on 28 August 2018 and re-designated as executive Director on 27 February 2019 The founder of our Group and one of our C

Responsible for the overall operational management of our Group He was re-appointed as an Executive Director and Vice-Chairman of the Board on 1 January 2020 Has more than 29 years of experience in pipe manufacturing industry Prior to joining our Grou

Responsible for the overall legal compliance of our Group Was appointed as an executive director in 2019 Has more than 27 years of experience in commercial legal advisory and 14 years of experience in management of oil pipe manufacturing business

Responsible for the overall human resources management of our Group Was appointed as an executive director on 27 February 2019, and is one of our Controlling Shareholders Has over 8 years of experience in management Joined our Group in May 20

Responsible for the overall financial management of our Group Was appointed as an executive Director on 27 February 2019 Has more than 34 years of experience in the operation of oilfield and 33 years of experience in auditing and accounting.

Responsible for the overall R&D and project management of our Group Was appointed as an executive Director on 27 February 2019 Mr. Yin has been the chief technical expert and deputy general manager of Dalipal Pipe since June 2017 and October 2016

Responsible for the overall administrative and operational management of our Group. Joined the Group in June 2017 as the general manager of Dalipal Pipeand became the director of Dalipal Pipe in December 2017 Prior to joining the Group, Mr. Bai was the

Mr. Lau is responsible for the financial operations and investor relations management of the Group, and serves as the company secretary of the company.