China has announced the development of its latest quantum system, combining the Xiaohong-504, a 504-qubit superconducting quantum chip, with the Tianyan-504 quantum computer. The breakthrough comes from China Telecom Quantum Group (CTQG), which will use the new supercomputer to boost national telecommunications security. The Xiaohong-504 chip reportedly demonstrates impressive specifications in critical areas including qubit lifetime, gate fidelity, and circuit depth, comparable with established quantum platforms such as IBM. The first Xiaohong-504 processor is scheduled for delivery to QuantumCTek, a quantum technology company based in Anhui Province, where it will begin extensive testing of kilo-qubit measurement and control systems.

While the Tianyan-504 represents a major achievement, it currently ranks behind some international competitors in terms of qubit count. Atom Computing's 1,180-qubit prototype was revealed in late 2023, and IBM's 1,121-qubit Condor processor maintains the lead in raw qubit numbers. The development of the Tianyan-504 was a collaborative effort between CTQG, the Chinese Academy of Sciences, and QuantumCTek. The system will be integrated into the Tianyan quantum cloud platform, which has already demonstrated significant international reach since its launch in November 2023, attracting more than 12 million visits from users across over 50 countries. Rather than focusing solely on achieving quantum supremacy, the Tianyan-504 project aim is developing infrastructure for large-scale quantum systems.