Xinhua News Agency, May 10, learned from the University of Science and Technology of China that the academician team of the university, Li Chuanfeng and Chen Geng, worked with their counterparts to achieve quantum precision measurement beyond the Heisenberg limit by using quantum uncertain causal order. The research results have been published in the international journal Nature Physics. The researchers say the experimental results have an important impact on the understanding of uncertain causal order and quantum precision measurement.