[1] He was the doctoral student of Julong Deng, the founder of grey system theory.
In 2000, he moved as a distinguished professor to Nanjing University of Aeronautics and Astronautics, where he also serves as director of the Institute for Grey Systems Studies.
In 2014, he worked as a research professor at De Montfort University in Leicester, UK.
[7] German Chancellor Angela Merkel mentioned Liu's contributions to grey system theory in a 2019 speech at Huazhong University of Science and Technology.
[8] In 2023, he received the Global Excellence Award from the Grey Systems Society of Pakistan.