MugRep: A Multi-Task Hierarchical Graph Representation Learning Framework for Real Estate Appraisal. - Weijia Zhang 003; Hao Liu 026; Lijun Zha; Hengshu Zhu; Ji Liu 003; Dejing Dou; Hui Xiong 001 (KDD, 2021)

A Hierarchical Reinforcement Learning Framework for Stock Selection and Portfolio. - Lijun Zha; Le Dai; Tong Xu 001; Di Wu 055 (IJCNN, 2022)