Group 1 - The core point of the article is that China National Petroleum Corporation has obtained a patent for a method of detecting multiphase flow phase content, with the patent announcement number CN114624274B and an application date of December 2020 [1] - China National Petroleum Corporation was established in 1999 and is primarily engaged in oil and gas extraction, with a registered capital of 18,302,097,000 RMB [1] - The company has made investments in 1,293 enterprises and participated in 443 bidding projects, holding 38 trademark records and 5,000 patent records, along with 168 administrative licenses [1]