A research team led by Prof. PENG Xinhua and Associate Prof. JIANG Min from University of Science and Technology China (USTC) of China Academy of Sciences (CAS), has, for the first time, reported the theoretical and experimental demonstration of quantum amplification using dark spins, with the magnetic field magnification exceeding 5,000 times and the single magnetic field measurement accuracy reaching 0.1fT level. The study was published in Proceedings of the National Academy of Sciences (PNAS).