shell:$ nslookup -timeout=2 -retry=1 'www.feishu.cn'
Server:		75.98.161.224
Address:	75.98.161.224#53

Non-authoritative answer:
www.feishu.cn	canonical name = www.feishu.cn.bytedns1.com.
www.feishu.cn.bytedns1.com	canonical name = www.feishu.cn.c.dsa.cdnbuild.net.
www.feishu.cn.c.dsa.cdnbuild.net	canonical name = l7-online-creative-global-v4.s.dsa.cdnbuild.net.
Name:	l7-online-creative-global-v4.s.dsa.cdnbuild.net
Address: 98.96.242.53
Name:	l7-online-creative-global-v4.s.dsa.cdnbuild.net
Address: 98.96.213.145