**Author details**

Yiwei Liao1,2, Xiaojing Shen3 \*, Junfeng Wang<sup>4</sup> and Yunmin Zhu<sup>3</sup>

1 School of Data Science, The Chinese University of Hong Kong, Shenzhen, Guangdong, China

2 Shcool of Information Science and Technology, University of Science and Technology of China, Hefei, Anhui, China

3 School of Mathematics, Sichuan University, Chengdu, Sichuan, China

4 School of Computer Science, Sichuan University, Chengdu, Sichuan, China

\*Address all correspondence to: shenxj@scu.edu.cn

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