Wuhan city of Central China’s Hubei province and Hefei city of East
China’s Anhui province, a world-leading quantum communication line was
officially put into service on Tuesday.
The Wuhan-Hefei trunk line is a major part of China’s quantum
communication network, designed to secure the information exchange in
Thanks to the technology, users from the military, government, finance,
and electricity sectors are able to send messages in a way that ensures
only they and their intended audience can read them.
The network, in comparison to traditional communication technologies,
features ultra-high security and is able to ward off hackers by using
China has made tremendous efforts in developing quantum technology over
In 2010, the first large-scale quantum communication test network in
China began construction and started operation two years later.
In September 2017, the Chinese Academy of Sciences announced that the
world’s first quantum-encrypted network was ready for use, which
connects Beijing and Shanghai, reaching further to Mozi satellite out in
space. The total bandwidth of the ground network is about 20 kilobits
One month later, the world’s first quantum communication trunk line
opened in China. Named "Shanghai-Hangzhou Quantum Communication
Commercial Trunk Line (or Shanghai-Hangzhou trunk line)," the
260-kilometer-long connection links Shanghai Municipality and the
eastern city of Hangzhou, with a price tag of nearly 25 million US
In the theoretical field, China transmitted entangled photons across
1,200 km in June by using the Mozi satellite. As the world’s first
quantum communication satellite, Mozi is expected to provide a technical
foundation for China to build a self-developed ultra-secure
The satellite’s launch lays a technical foundation for large-scale
quantum networking and experimental research into quantum communication,
as well as experimental testing in the basic principles of physics.