Based on practical technological achievements of "Hefei metro area quantum communication demonstration network", the Jinan network has realized safe, reliable, integrated and engineering quantum key distribution system. It has the world's largest number of quantum nodes, users, business categories and distributed “keys” for presently known metro area quantum communication network when the network was first built. Network services cover government affairs, finance, scientific research, education and many other areas, fully hosting practical applications and providing high-quality user experiences.