On October 31, Guangxi Power Grid Company, a subsidiary of China Southern Power Grid, revealed that its electrical power quantum technology team, in partnership with the National Institute of Metrology, the Institute of Electrical Engineering at the Chinese Academy of Sciences, and Nankai University, has successfully created a practical high-temperature superconducting quantum voltage standard system. This system, which incorporates a high-temperature superconducting quantum voltage chip independently developed by the team, offers a 'self-controllable, plug-and-play' quantum reference standard for precise voltage measurements. This milestone represents a significant leap in China's quantum technology application, paving the way for practical systems capable of generating higher output voltage amplitudes. It has been reported that the first-generation practical high-temperature superconducting quantum voltage standard system, QUS-π(v1.0), was unveiled at the 22nd China-ASEAN Expo. Voltage measurement is crucial for the advancement of precision industries, with accuracy requirements varying across different sectors. While current technologies suffice for everyday applications, fields demanding high precision, such as mobile phone chip circuit calibration and hospital MRI equipment parameter settings, necessitate voltage references of extremely high accuracy and stability. The primary benefit of quantum voltage standards is their ability to trace voltage back to internationally recognized fundamental physical constants, providing a reliable benchmark for ultra-precise measurement scenarios. However, traditional quantum voltage standard technology relies on an ultra-low-temperature environment maintained by liquid helium, leading to high costs, bulky equipment, and complex operation and maintenance, which hinder widespread deployment. This time, the team from Guangxi Power Grid Company of China Southern Power Grid has innovatively shifted from the 'low-temperature superconductivity + liquid helium' paradigm to a 'high-temperature superconductivity + liquid nitrogen' approach, shrinking the equipment to backpack size and significantly reducing system complexity and barriers to application. This breakthrough facilitates the transition of quantum voltage standard technology from laboratory settings to industrial use. The technology will not only offer vital support for the construction of new power systems, fostering the establishment of a flattened traceability system for power system measurements and enhancing the operational efficiency and measurement accuracy of new power systems, but also find extensive applications in traceability systems for AC/DC standard sources, digital instruments, and other equipment. It will boost the traceability efficiency and management level of power grid instruments and extend its reach to multiple fields, including aerospace, ocean navigation, and electric transportation.