Group 1 - The Beijing Municipal Market Supervision Administration organized the main event for the 2025 "World Metrology Day," showcasing multiple smart metrology technology achievements [1] - The online verification of taxi meters in Beijing is expected to reach an 80% coverage by 2030, benefiting 50,000 taxis in the city [1] - The theme for the 2025 "World Metrology Day" in China is "Metrology Meets the Needs of the Times, Responds to the Public's Expectations" [1] Group 2 - A new online verification system for taxi meters was established, utilizing advanced technologies such as video recording, laser radar integration, and edge computing to facilitate real-time verification [1] - The mandatory metering instrument public service system launched in April 2025 allows for full online processing and digital management of metering instrument verification [1] - The system enables enterprises and individuals to report metering instruments via mobile devices, with a "one instrument, one code" feature for public query [1] Group 3 - Breakthroughs in smart metering technology for electric meters include the establishment of a large database and a remote monitoring system, enhancing the accuracy of smart electric meters [2] - In 2024, a special metrology supervision inspection action will be conducted, checking 53,300 metering devices and addressing 270 metering violation cases [2] - Public engagement activities, such as "Public Open Day," allow citizens to learn about metrology services and technology, enhancing public understanding of metrology [2]