shell:$ nslookup -timeout=2 -retry=1 'upload.iflix.com'
Server:		127.0.0.53
Address:	127.0.0.53#53

Non-authoritative answer:
upload.iflix.com	canonical name = ins-vhu6xe8n.ias.tencent-cloud.net.
Name:	ins-vhu6xe8n.ias.tencent-cloud.net
Address: 43.156.222.203
Name:	ins-vhu6xe8n.ias.tencent-cloud.net
Address: 43.156.222.16