Chinese scientists have successfully transmitted high-definition video signals over kilometers using terahertz wireless communication technology, marking the world's first case to apply superconducting terahertz receivers to long-distance wireless communication systems.
Terahertz waves refer to electromagnetic waves with wavelengths between 3,000 and 30 micrometers, sitting between microwaves and optical infrared frequencies. Research into the terahertz range deepens the understanding of fundamental scientific questions in physics, astronomy, and information science. Applications for terahertz technology span various fields, including astronomical observation, biomedical science, and data transmission, with significant implications for cutting-edge research, national economic development, and security.
The experiment was carried out from Sept 27 to Oct 1 at the submillimeter-wave astronomical observation base at an altitude of over 4,000 meters located on the Qinghai-Xizang Plateau. Researchers from the Purple Mountain Observatory under Chinese Academy of Sciences led the experiment with other teams.
"For example, if we see microwave communication as a two-lane road, then terahertz communication, due to its broader and richer spectrum resources, is like expanding that road to six or eight lanes. The significance of the superconducting detection technology we used this time lies in its high sensitivity. It's like having better-performing cars on this wider road, with almost no energy loss, allowing the signals to travel much farther," said Li Jing, researcher at the Purple Mountain Observatory.
This experiment has fully demonstrated the unique advantages of using superconducting receivers in terahertz communication, laying critical technical foundation for future space and air-to-ground high-capacity terahertz communication, as well as the construction of a multi-disciplinary platform at the submillimeter-wave observatory.
Chinese scientists achieve breakthrough in long-distance terahertz wireless communication
Chinese scientists achieve breakthrough in long-distance terahertz wireless communication
China's steel industry has achieved intensive breakthroughs in high-end precision materials since the beginning of this year, with a batch of advanced specialty steels empowering frontier industries including electronics, new energy and high-end equipment.
In the mobile communication era of 4G, the thickness required for an ultra-thin low-carbon steel foil is 0.12 mm to enable convenient and speedy signal transmission.
Such a demanding requirement is tightened to a mere 0.10 mm in today's 5G new era, which means more complicated techniques for its manufacturers.
For a long time, the rolling methods relied heavily on foreign enterprises. However, Shougang Group teamed up with the University of Science and Technology Beijing (USTB) in 2013 to conduct scientific research and development on the continuous rolling process of "5G steel," a nickname of the ultra-thin low-carbon steel foil.
The "5G steel" that independently developed by China - as thin as 0.07 mm - has entered mass production and been widely used for 5G base station signal receivers, signal transmission filters, and integrated circuit boards, and new energy battery connection pieces.
"Although it's thin, it has excellent toughness and feels like paper, and we can easily bend it and repeatedly fold it," said Hu Na, an engineer at Shougang Jingtang Steel United Iron and Steel Co., Ltd. She folded the steel into a classic "paper plane" to show its flexibility.
This year, China has been using specialty steels to empower the development of new quality productive forces.
For instance, in industrial sector, China has continued to push performance limits of silicon steel -- an iron-silicon alloy used primarily in electrical applications due to its good magnetic properties, with 0.1-millimeter-grade non-oriented electrical steel achieving global top-tier status in electrical steel iron loss indicators.
The material now is widely used in drive motors for new energy vehicles and joint motors for humanoid robots.
The breakthroughs came as China's steel industry continues to shift toward higher value-added products, with the manufacturing sector's share of steel consumption surpassing that of the construction sector for the first time in 2025.
China makes intensive breakthroughs in high-end steel products in 2026
