IntroductionWeihai sunfull geophysical exploration equipment Co., Ltd. was established in 2007 with a registered capital of 51.75 million(RMB). We are provincial high-tech enterprise and innovative enterprise specializing in R & D and manufacturing of land and offshore oil geophysical exploration equipment. We specialized in the construction of innovation platform with strong R & D and testing strength, and have three provincial scientific research platforms: Shandong sensing information engineering technology research center, Shandong geophysical exploration equipment engineering laboratory and Shandong marine geophysical exploration equipment Engineering Technology Collaborative Innovation Center. We have undertaken 2 National 863 projects, 1 National Science and technology major project, and more than 30 provincial and ministerial projects. 17 projects have been identified through provincial scientific and technological achievements, and 10 projects with the product technology level reaching the international advanced level. As a domestic enterprise with strong R & D and manufacturing capacity of domestic petroleum geophysical sensors, we have been insisting on high investment in science and technology for many years, and the proportion of science and technology investment in the annual sales revenue has reached more than 5%, which ensures the continuous improvement of the company's independent innovation ability. As of December 2020, we have applied for 112 patents and authorized 77 patents, including 14 invention patents. At present, more than 90% of the company's intellectual property technologies characterized by patents have been successfully applied to the products being developed and produced, and has successfully realized the "double harvest" of technological innovation and transformation of technological achievements. Sunfull has outstanding performance in intellectual property, and have win the honorary title of "national intellectual property advantage enterprise" by the State Intellectual Property Office, the honorary title of "three-star enterprise of Chinese patent Shandong" by Shandong science and technology department and Shandong Intellectual Property Office, and honorary title of "Weihai patent demonstration unit" by Weihai science and Technology Bureau and Weihai Intellectual Property Office. We attach great importance to industry university research cooperation, and has established long-term and stable cooperative relations with many scientific research institutes and colleges, such as Institute of acoustics, Chinese Academy of Sciences, Harbin Institute of Technology (Weihai), Shandong University, Nanjing University of Aeronautics and Astronautics, Shandong Laser Research Institute, Shandong Coal Geology Bureau, etc.Sunfull has an annual production capacity of 1.5 million petroleum exploration geophones and related geophysical exploration equipment products, and its core products occupy more than 20% of the domestic market. As a midstream enterprise in the petroleum exploration industry chain, we are procurement and network access unit of PetroChina and Sinopec, serving downstream customers all over the major domestic oilfields. Sunfull has also obtained the quality certification of Dutch Shell company and American Western oil company. Its products are exported to more than 30 countries and regions such as Eastern Europe, Central Asia, South Asia, Africa and South America. We have passed ISO9001 quality management system certification, ISO14001 environmental management system certification, OHSAS occupational health and safety management system certification and national intellectual property management system certification, enterprise management standards.