弓上弦，刀出鞘
gōng​shàng​xián​dāo​chū​qiào

to be fully prepared

弓上弦，刀出鞘 gōng​shàng​xián​dāo​chū​qiào
to be fully prepared
Literally means a bow with the arrow on the string and a sword drawn from its scabbard; it is used as a metaphor for being ready for battle or having made every preparation for an imminent action