上下 (shàng xià) means “up and down; top and bottom; old and young; length; about”. It is an HSK 5 Chinese word in the HSK 3.0 vocabulary.
Practice each character:
电梯上下运行。
Diàntī shàngxià yùnxíng.
The elevator goes up and down.
Updated: 2026-07-18