National Space Science Center;
Chinese Academy of Sciences;
Beijing100190;
China;
University of Chinese Academy of Sciences;
Beijing100049;
China;
National Astronomical Observatories;
Chinese Academy of Sciences;
Beijing100101;
China;
Center for Astronomical Mega-Science;
Chinese Academy of Sciences;
Beijing100101;
China;
CAS Key Laboratory of FAST;
National Astronomical Observatories;
Chinese Academy of Sciences;
Beijing100101;
China;
pulsars:general; methods:statistical; methods:data; analysis;