shuāng huáng
a form or theatrical double act, popular since Qing times, with one player seated stage front and acting out the poem or song of the second player hidden at the back (also written 雙黄|双黄)
double reed (as used in oboe or bassoon)
an oboe or bassoon
shuāng huáng guǎn
double reed wind instrument (such as oboe or bassoon)
chàng shuāng huáng
lit. to sing a duet
fig. to collaborate with sb
also used satirically: to play second fiddle to