Correct
足下
/ zúxià /
Strokes
Definition
you (used to a superior or between persons of the same generation)/below the foot
Example
As a Noun
polite form of address between friends (used mostly in letters)
1
Zúxià
足下
yǐwéi
以为
rúhé
如何
?
What's your opinion?
As a Noun
underfoot
2
Qiānlǐzhīháng
千里之行
,
shǐyúzúxià
始于足下
。
A thousand li 's journey starts with the first step.