xuán yá lè mǎ
lit. to rein in the horse at the edge of the precipice (idiom)
fig. to act in the nick of time
悬
xuán
to hang or suspend
崖
yá
precipice
勒
lè
(literary) bridle; halter; headstall
马
mǎ
abbr. for Malaysia 馬來西亞|马来西亚[Ma3 lai2 xi1 ya4]