Key Laboratory of Cosmology and Astrophysics(Liaoning Province)&Department of Physics;
College of Sciences;
Northeastern University;
Shenyang 110819;
China;
Key Laboratory of Data Analytics and Optimization for Smart Industry(Ministry of Education);
Northeastern University;
Shenyang 110819;
China;
National Frontiers Science Center for Industrial Intelligence and Systems Optimization;
Northeastern University;
Shenyang 110819;
China;
neutral hydrogen sky survey; 21 cm intensity mapping; dark energy; large-scale structure; joint survey strategy;