bù wèi zuǒ yòu tǎn
to remain neutral in a quarrel (idiom)
不
bù
no; not so
为
wèi
variant of 為|为[wei4]
左
zuǒ
left
右
yòu
(bound form) right; right-hand side
袒
tǎn
old variant of 袒[tan3]