APNIC (the Asia-Pacific Network Information Centre) is the Regional Internet address Registry (RIR) for the Asia-Pacific region.
It allocates and assigns IPs for CN, HK, TW, etc.
See https://github.com/17mon/china_ip_list
See https://github.com/ACL4SSR/ACL4SSR
www.ipdeny.com provides IPs zones of CN, HK, TW, etc.
Generally, these sources are too old, or have been obsolete.
http://www.nirsoft.net/countryip/cn.html