qián shào
outpost
(fig.) front line
jiǎn chá shào
inspection post
checkpoint
hū shào
to whistle (with fingers in one's mouth)
nowadays written 呼哨
liào shào
to go on sentry duty
to stand guard
míng gǎng àn shào
both covert and undercover (officers) keeping watch (idiom)
hū shào
to whistle (with fingers in one's mouth)
nowadays written 呼哨
chuī shào
to blow a whistle
to whistle
fàng shào
to keep watch
to do sentry duty
to be on patrol
hēi shào
(soccer etc) corrupt officiating
dubious call