Core Points - The article discusses the ongoing maintenance and upgrade of the lighting system at Tiananmen Square, focusing on the cleaning and repair of the "Hualan" lights, which is expected to be completed by early August 2023 [1][2]. Group 1: Maintenance and Repair - The maintenance work includes the cleaning and repair of 253 "Hualan" lights, 2,849 light balls, and over 6,000 light sources, with a focus on upgrading the single light monitoring system [1][2]. - The newly implemented single light monitoring system, launched in 2023, allows for real-time monitoring of each light source's operational status, enhancing the precision of maintenance efforts [2]. Group 2: Aesthetic Enhancements - The maintenance also involves deep cleaning and restoration of 110 granite lamp bases, which will be repainted and repaired to preserve their artistic designs, symbolizing the nation's prosperity [4]. - The lamp bases, originally modified in 2012, feature unique floral patterns, contributing to the cultural significance of the lighting system at Tiananmen Square [4]. Group 3: Green Transformation - The lighting center is testing the application of CLED light sources, which are energy-efficient and have high luminous efficacy, as part of a green transformation initiative [6]. - A one-year trial will assess the stability and energy-saving effects of CLED light sources under various seasonal and climatic conditions [6].

Group 1: Oil and Gas Production - Fuman Oilfield, located in the Taklamakan Desert, is China's largest ultra-deep oilfield with cumulative oil and gas production exceeding 20 million tons [1] - The oilfield has drilled 144 ultra-deep wells over 8000 meters, making it the most concentrated area of ultra-deep wells in China [3] - The oilfield covers an area of 17,000 square kilometers with oil and gas resources exceeding 1 billion tons, recognized as the deepest and largest oil production area in China [1] Group 2: Drilling Efficiency and Technology - Recent advancements have led to a significant reduction in drilling completion times, with the average completion cycle for main production areas decreasing from 144.2 days to 109.8 days year-on-year [3] - The introduction of intelligent monitoring systems, such as the ALC05 and KC02 water analysis instruments, has optimized water injection development and improved real-time monitoring of oil-water ratios [3] Group 3: Russia-China Oil Supply Dynamics - Russia is willing to increase its annual oil supply to China by 2.5 million tons, with plans to expand export capabilities through Kazakhstan [5] - In 2022, China imported 108 million tons of crude oil from Russia, accounting for 20% of its total crude oil imports, despite a 1.9% decline in overall crude oil imports [6] - Russia's commitment to supply oil to China amid Western sanctions highlights the strengthening of economic ties between the two nations [8]