Xin Liu is an Associate Professor of Computer Science at Lappeenranta-Lahti University of Technology LUT, Finland. He received his Ph.D. degree in Computer Science from University of Oulu, Finland in 2019, and Ph.D. degree in Information and Communication Engineering from Xi'an Jiaotong University, China in 2016. He was an Academy of Finland postdoc fellow. Dr. Liu was a senior researcher worked with Professor Guoying Zhao and Professor Matti Pietikainen at CMVS group at University of Oulu, Finland. From August 2017 to February 2018, he was a visiting researcher at the University of Sydney, Australia, worked with Professor Dacheng Tao. From March to August 2019, he worked with Professor Stefanos Zafeiriou at the Imperial College London, United Kingdom. Xin has been awarded and funded by the Academy of Finland, Finnish Foundation for Technology Promotion (TES), Nokia Foundation, KAUTE Foundation, Otto A. Malm Foundation, Tauno Tonning Foundation, and Riitta Ja Jorma J. Takanen Foundation for his research excellence on computer vision and artificial intelligence. He was the winner of the Endeavour Research Fellowship by Australian Government Department of Education and Training.