In this Winter Olympics, science and technology and green are two major themes, which are reflected in all aspects, regardless of venue construction, event organization, equipment and facilities. The torch is one of the most prominent symbols of the Winter Olympics. The torch of this Winter Olympics has achieved zero carbon emissions for the first time in the history of the Winter Olympics.

Clean energy lights the torch of the Winter Olympics. "Yang Fei" is the name of the torch in this Winter Olympics. It uses hydrogen as fuel, and it is the first high-pressure hydrogen storage torch in the world, achieving zero carbon emission of the torch in the history of the Winter Olympics.

The whole is the core of the torch, which we call the hydrogen core. This part is our gas cylinder, aluminum alloy liner, and carbon fiber winding mainly considers safety, and its pressure bearing capacity should reach 42 MPa. It should belong to the category of high pressure. It is necessary to decompress the hydrogen stored in the gas cylinder to normal pressure, which is our aerospace proprietary technology.

Hydrogen is green and environmentally friendly, but it is flammable, explosive and easy to leak. There is no precedent for the successful use of hydrogen as torch fuel in previous Winter Olympics. In order to fit the curved shell design of the hand-held torch in the Winter Olympics, under the condition of limited internal space, researchers boldly innovated and adopted targeted design and lightweight technology to "slim down" the whole combustion system and make room to ensure sufficient fuel storage.