The team led by Academician Guo Guangcan and Professor Han Zhengfu from the University of Science and Technology of China, in collaboration with Zhang Wenfu's team from the Xi'an Institute of Optics and Precision Mechanics, proposed and implemented a large-scale integrated measurement-device-independent quantum key distribution network scheme based on microcavity optical solitons, providing a new pathway for the large-scale practical deployment of highly secure quantum networks.