张冠李戴

lit. to put Zhang's hat on Li's head / to attribute sth to the wrong person (idiom) / to confuse one thing with another

surname Zhang

to open up / to spread / sheet of paper / classifier for flat objects, sheet / classifier for votes

surname Guan

hat / crown / crest / cap

to put on a hat / to be first / to dub

plum

surname Dai

to put on or wear (glasses, hat, gloves etc) / to respect / to bear / to support