These entries are queried from radb.net using whois, you can try my project getting these.
:AS9807 route: 219.235.128.0/21 descr: Data Management Centre National Bureau descr: of Statistics of China country: CN origin: AS9807 mnt-by: MAINT-CNNIC-AP last-modified: 2022-11-22T06:10:02Z source: APNIC rpki-ov-state: valid route: 219.235.136.0/21 descr: Data Management Centre National Bureau descr: of Statistics of China country: CN origin: AS9807 mnt-by: MAINT-CNNIC-AP last-modified: 2022-11-22T06:20:02Z source: APNIC rpki-ov-state: valid route: 219.235.144.0/21 descr: Data Management Centre National Bureau descr: of Statistics of China country: CN origin: AS9807 mnt-by: MAINT-CNNIC-AP last-modified: 2022-11-22T06:20:02Z source: APNIC rpki-ov-state: valid