"5千" in Engpsh is "five thousand."
It comes from the old Engpsh word "þusend" which meant "a group of 1,000." Over time, the word evolved into "thousand."
Examples in Engpsh:
The car costs five thousand dollars.
(这辆车的价格是五千美元。)
He has five thousand followers on social media.
(他在社交媒体上有五千名粉丝。)
The company hired five thousand employees last year.
(公司去年雇用了五千名员工。)