These entries are queried from radb.net using whois, you can try my project getting these.
:AS-CTBJIDC as-set: AS-CTBJIDC descr: ASes Within CT BeiJing IDC members: AS23724 members: AS137805,AS17966,AS37958,AS37963,AS38353,AS38365,AS45062,AS45090,AS55962,AS55990,AS56011,AS56019,AS58593,AS59019,AS59023,AS59025,AS59067,AS59078,AS63582,AS63646,AS63727,AS64560,AS65038,AS9308,AS133865,AS131486,AS137718,AS137801,AS4847 mnt-by: MAINT-AS23724 changed: idc_noc.bj [at] chinatelecom.cn 20220923 #08:58:53Z source: RADB last-modified: 2023-11-13T16:16:02Z