These entries are queried from radb.net using whois, you can try my project getting these.
:AS23840 route: 211.156.48.0/20 descr: E-teda Technology Industrial Co.Ltd descr: Tianjin economic-technologyical development area country: CN origin: AS23840 mnt-by: MAINT-CNNIC-AP last-modified: 2008-09-04T07:54:28Z source: APNIC rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source