Network Technology Research Institute;
China United Network Communications Corporation Limited;
No. 9;
Shouti Nanlu;
Haidian District;
Beijing 100048;
China;
Network and Information Security Research Department;
Electronic Technology Information Research Institute;
MIIT;
No. 35;
Lugu Road;
Shijingshan District;
Beijing 100040;
China;
Tencent Research;
Shanghai;
China;
School of Electronic and Information Engineering;
Beijing Jiaotong University;
Beijing 100044;
China;