hàng xiè yī qì
to act in collusion (idiom); in cahoots with
villains will look after one another
yī qì
at one go
at a stretch
for a period of time
forming a gang
yī qì zhī xià
in a fit of pique
in a fury
yī qì hē chéng
to do something at one go
to flow smoothly
chuàn tōng yī qì
to act in collusion (idiom)