Group 1 - The event on May 20 showcased multiple technological achievements of China Southern Power Grid, including the launch of the Metering Automation System 3.0 in Guangdong, which has achieved full localization and cloud integration, enhancing computing power by 10 times [1] - The metering automation verification now covers five provinces in Southern Power Grid's operational area, with an annual verification capacity of 28 million meters, and the implementation of smart meter status evaluation and replacement can save an average of 1.35 billion yuan annually [1] Group 2 - The "Dianhong" IoT operating system, developed in collaboration with the Open Atom Open Source Foundation, connects various segments of the power infrastructure, facilitating digital transformation in metering by breaking down inter-device barriers [2] - The smart meters equipped with non-invasive monitoring apps can provide real-time alerts for electrical leaks, enhancing user safety and reducing power outage times by over half an hour in pilot areas [2][3] Group 3 - The digitalized transparent factory in Qingyuan, Guangdong, utilizes robots for automatic testing of electric meters, ensuring compliance with national standards and maintaining accurate metering for millions of households [4] - The quantum standard electric meter, developed in the quantum metrology laboratory, improves measurement accuracy by five times compared to traditional methods, significantly enhancing domestic manufacturing capabilities for high-end metering instruments [5]