Contest Consultation WeChat (Contest Organizing Committee)：Liu : 159 0630 1069
Wang : 158 0631 1028
Tan : 151 4640 9277
Contest Consultation Mailbox (Contest Organizing Committee)：hitwhai@hitwh.edu.cn
Contest registration error correction WeChat (Contest Organizing Committee)：Zhao :123993958
Contest registration error correction Mailbox (Contest Organizing Committee)：123993958@qq.com