tú láo wú gōng
to work to no avail (idiom)
徒
tú
(bound form) disciple; apprentice; believer; (derog.) wrongdoer (as in 騙徒|骗徒[pian4 tu2] "swindler" or 叛徒[pan4 tu2] "traitor" etc)
劳
láo
(bound form) to toil; labor
无
wú
not to have
功
gōng
meritorious deed or service
