Correct

踏足

/ tā jù / 
Strokes

Definition

to set foot on (a foreign land etc)/to tread/(fig.) to enter (a new sphere)

Example

As a Verb

set foot (in/on)

1
Tājù
踏足
shāngjiè
商界

set foot in business

2
Tājù
踏足
qíjiān
其间

set foot in the midst of sth