China is preparing to launch a communications system that would be impossible to hack.
The quantum communication system is set to be used by 200 users from government, finance and military personal in the city of Jinan. 
The Jinan Institute of Quantum Technology said the technology, which was tested earlier this month, is expected to be put into commercial use in August.
The network uses quantum key distribution to transmit messages. The connections are far more secure than current internet or telephone cables, which can be tapped and monitored.
Quantum networks, unlike traditional systems, send messages embedded in particles of light. If any third party attempts to hack the network the quantum nature of the particles will alter the communication and cause it to be aborted, meaning the message is impossible to read or intercept.
“We plan to use the network for national defence, finance and other fields, and hope to spread it out as a pilot that if …