镳

连镳并轸

lián biāo bìng zhěn

lit. reins together and carriages level (idiom); keeping exactly abreast of one another

保镳

bǎo biāo

variant of 保鏢|保镖[bao3 biao1]

分道扬镳

fēn dào yáng biāo

lit. to take different roads and urge the horses on (idiom)