niú jì tóng cáo
cow and famous steed at the same trough (idiom); fig. the common and the great are treated alike
also written 牛驥同皂|牛骥同皂[niu2 ji4 tong2 zao4]
牛
niú
ox
骥
jì
thoroughbred horse
同
tóng
like
槽
cáo
trough