gé kōng hǎn huà
to converse with sb by shouting from some distance away
(fig.) to say sth intended for the ears of sb who is not in one's presence (often, by making a public statement or by posting online)
隔
gé
to separate
空
kōng
empty
喊
hǎn
to yell
话
huà
old variant of 話|话[hua4]