shell:$ nslookup -timeout=2 -retry=1 'res.wx.qq.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:
res.wx.qq.com	canonical name = reswx.tc.qq.com.
reswx.tc.qq.com	canonical name = jxt2rgi0.ovslegodl.sched.ovscdns.com.
Name:	jxt2rgi0.ovslegodl.sched.ovscdns.com
Address: 43.152.2.154
Name:	jxt2rgi0.ovslegodl.sched.ovscdns.com
Address: 43.159.79.49