Category: Technology

China’s hack-proof quantum communication technology is “primarily ready” for practical use after a 4,600km (2,858 mile) network was put through two years of experimental service, researchers announced.
When fully developed, quantum communication can be applied in fields such as finance, defence, government administration and electronic information, according to scientists. This network consisted of the Micius satellite – the world’s first quantum communication satellite launched in 2016 – and more than 700 optical fibres covering 2,000km and connecting 32 nodes across four provinces and three municipalities in China. It was completed in 2017 and has realised communication up to a distance of 4,600km.

China built a high-temperature superconducting maglev train prototype in the SW city of Chengdu. The maglev, which can reach speeds of 620 km per hour, is expected to be the fastest land vehicle.

China’s first independently-developed 3.2-meter three-segment solid rocket motor for civil space completed its first ground test in Xi’an, Northwest China’s Shaanxi Province on Wednesday, marking China’s largest and the most powerful segment-type solid rocket engine tested to date. The segmental solid rocket buster is a solid fuel rocket engine divided into several sections and each section has its own shell, adiabatic structure and propellant charge column.
The engine can be applied to large & heavy rockets to meet the needs of space equipment, manned moon landing & space exploration.

China successfully launched remote-sensing satellite No. 33 on a Long March 4C carrier rocket from the Jiuquan Satellite Launch Center in Northwest China late Sunday. The mission also launched a micro-nano technology test satellite.

12-26-20 The world’s strongest nuclear astrophysical accelerator was initiated in the deepest underground laboratory in the world, 2,400 meters underground, in Jinping, China on Saturday.

China’s new generation medium-sized launch vehicle Long March-8 made a successful maiden flight from the tropical island province of Hainan in South China on Tuesday, sending five satellites into designated orbit at the same time. 
The 50.3-meter-long Long March-8 has a 3.35-meter-diameter core stage and two 2.25-meter-diameter side boosters. Weighing 356 tons at launch, it has a 480-ton take-off thrust and is capable of sending payloads weighing more than 4.5 tons into the SSO 700 kilometers above the ground.
A rocket engine needs to be throttleable to achieve zero velocity at the same time as it reaches the ground, which is a core technological requirement for building a reusable launch vehicle system.
This technology was tested for the first time in the Long March-8 maiden flight, which is also an experimental flight for the new rocket type, paving the way for further study and development for the reusable rocket system.