China’s Jinan City Builds ‘Unhackable’ Quantum Network

A quantum simulation laboratory at the Chinese Academy of Sciences in Shanghai. Photo: Xinhua

SCMP says in its report “Chinese city to launch ‘unhackable’ quantum network” today, “Tests on system in Jinan in Shandong province complete and service for nearly 200 users to begin next month, state-run media report”.

China has built world largest land-based quantum network between Beijing and Shanghai but the system is at least in part sharing existing optical fibre lines with traditional telecommunications networks. The “hybrid” structure might compromise security in some cases. However, the Jinan one does not has such sharing and is thus exclusively secure.

Comment by Chan Kai Yee on SCMP’s report, full text of which can be found at