PETROCHINA(SH:601857) Sou Hu Cai Jing·2026-02-27 05:17Core Viewpoint - China Kunlun Engineering Co., Ltd. and China National Petroleum Corporation have obtained a patent for "Sublimation Purification Equipment and Method," with the authorization announcement number CN121016239B, and the application date is September 2025 [1] Group 1: Company Overview - China Kunlun Engineering Co., Ltd. was established in 1986 and is located in Beijing, primarily engaged in civil engineering construction. The company has a registered capital of 600.2 million RMB [1] - China National Petroleum Corporation was established in 1990 and is also located in Beijing, primarily engaged in oil and gas extraction. The company has a registered capital of 48.69 billion RMB [1] Group 2: Investment and Project Participation - China Kunlun Engineering Co., Ltd. has invested in 5 companies and participated in 5,000 bidding projects, holding 401 patents and 14 administrative licenses [1] - China National Petroleum Corporation has invested in 110 companies and participated in 5,000 bidding projects, with 1,427 trademark registrations, 5,000 patents, and 28 administrative licenses [1]