QuantumCTek Co., Ltd. manufactures and sells quantum information technology enabled information and communication technology security products and services in China. The company offers quantum products, including miniaturized quantum key distribution terminals, and polarization coding quantum key distribution and management terminals; high speed time-bin phase-coding and miniaturized time-bin phase-coding quantum key distribution terminals; portable ground stations for satellite QKD; quantum key management, key system exchange cipher, and optical switching machines, as well as wavelength division multiplexing terminals of quantum channels and classical channels; and fixed network encryption application products. It also provides mobile encryption application products; operating system software, such as Gou-Dun quantum-secure communication network management system and Gou-Dun network operation and maintenance system; and ultra-low temperature and noise platform system. In addition, the company offers optoelectronic products comprising single-photon detectors; quantum random number sources; and core devices, which include multi-function high speed ps-pulse laser source, periodically poled lithium niobate waveguide, geiger-mode InGaAs avalanche photodiode, micro-processor compensated variable optical attenuator, QFPS fiber phase shifter, manual polarization controller, and dynamic polarization controller products. Further, it provides teaching systems; scientific instruments; and quantum precision measurement products. The company serves the government, finance, power, national defense, and other sectors. QuantumCTek Co., Ltd. was founded in 2009 and is based in Hefei, China.