These entries are queried from radb.net using whois, you can try my project getting these.
:AS-CTTJ as-set: AS-CTTJ descr: ASes within CT TIANJIN province members: AS17638 members: AS58542 members: AS14857,AS17430,AS23840,AS45090,AS63707,AS9394,AS55423,AS4847,AS4809,AS4808,AS45090,AS4134,AS38277,AS37981,AS24416,AS24405,AS24138,AS23724,AS17429,AS134705,AS133948,AS45070,AS38019 mnt-by: MAINT-AS58542 changed: liukun.tj [at] chinatelecom.cn 20210628 #01:48:31Z source: RADB last-modified: 2023-11-13T16:07:36Z