It's difficult to understand what's in his heart.

He is said to have a long philtrum.

This road is under construction, so you cannot pass through.

He is receiving treatment for alcoholism.

My computer is currently under examination.

Next month, I am planning my first visit to China.

I plan to visit China next month.

He doesn't take my opinion into consideration at all.

This document contains important information.

This problem falls into the category of mathematics.