shell:$ nslookup -timeout=2 -retry=1 'cdnv.ruguoapp.com'
;; communications error to 75.98.161.224#53: timed out
Server:		69.39.86.5
Address:	69.39.86.5#53

Non-authoritative answer:
cdnv.ruguoapp.com	canonical name = ga-bp1k4dl0sr8b5njxlsoyu.aliyunga0017.com.
Name:	ga-bp1k4dl0sr8b5njxlsoyu.aliyunga0017.com
Address: 47.242.14.200