About
HSK levels

    先头 先頭

    xiāntóu

    1. (usu. of troops) in advance; in the vanguard; in front; placed ahead of others
    2. previously

    先头部队已经到达了目标地点。 xiāntóu bùduì yǐjīng dàodá le mùbiāo dìdiǎn.