Group 1 - The "Deep Sea No. 1" Phase II project has achieved full production, with a total of 23 underwater gas wells operational, reaching a maximum daily output of 15 million cubic meters, making it the largest offshore gas field in China [2][4] - The project consists of two phases, with Phase I launched in June 2021 and Phase II deploying 12 underwater gas wells across three areas, along with new infrastructure including a platform and underwater production systems [2][3] - The project faces complex natural conditions, with total well depths exceeding 60,000 meters, maximum formation temperatures of 138 degrees Celsius, and pressures reaching 69 MPa, presenting significant technical challenges [3] Group 2 - The "Deep Sea No. 1" gas field is expected to produce over 4.5 billion cubic meters of gas annually, with the gas being distributed to regions such as the Guangdong-Hong Kong-Macao Greater Bay Area and Hainan Free Trade Port [4] - The project has led to the development of five world-first key technologies for deep-water high-pressure well drilling and completion, enhancing operational efficiency by over 30% [3] - An innovative development model combining underwater production systems with shallow water platforms and deep-water semi-submersible platform remote control systems has been introduced, transforming existing shallow water gas field facilities into gas transmission hubs [3]