This is the 162nd most frequent Chinese word.
正在
"正在" means "in the process of" or "currently."
Currently in the process of.
我正在学习中文。
I am currently learning Chinese.
Engaged in an action at this moment.
他正在做作业，请稍等一下。
He is doing his homework right now; please wait for a moment.
Ongoing activity or situation.