HSK 7-9
防火墙
fánghuǒqiáng名
firewall
技术人员正在更新防火墙。
Jì shù rén yuán zhèng zài gēng xīn fáng huǒ qiáng.
The technician is updating the firewall.
Say it
Hold the button, say it, then let go.
Other HSK words sharing a character
Also free:
Appears across levels (7-9) in the HSK 3.0 word list.