“Jie zu xian deng” is a set phrase meaning that the nimble-footed will ascend the peak first, also used as a metaphor for a swift action to achieve success ahead of others.
捷足先登[jié zú xiān dēng]
The swift-footed arrive first; the race is to the swiftes; it’s the early bird that catches the worm;
Wǒ zhèng yào shēn qǐng nà gè gōng zuò shí，fā xiàn yǐ yǒu rén jié zú xiān dēng。
我 正 要 申 请 那 个 工 作 时，发 现 已 有 人 捷 足 先 登。
I found that someone had beaten me to it when I was going to apply for the job.