mǎ shàng
at once
right away
immediately
on horseback (i.e. by military force)
zǒu mǎ shàng rèn
to ride to take up an official appointment (idiom); to take on a job with alacrity
to undertake a task
mǎ shàng bǐ wǔ
tournament (contest in Western chivalry)
jousting