Brent Christensen

Yingying Zhang is from a region of Southeast China.

When you get there, you can see this natural beauty.

It's near the Wuyi Mountain, surrounded by what is known as the Nine Bend River.

The main economy in this area is tea farming.

Yingying's hometown of Nanping is one of the poorer cities in the country.

When I got there, the people were so nice.

The family welcomed me.

When I came to their apartment, it was very modest.

There was no heating.

So when I sat down to interview them, we actually had to wear our coats.

The moment in June 2017, what did you hear first, that she was missing?

Yingying has a younger brother, dropped out of school when he was middle school age, and he's learning to be a cook.

Yingying was very special.

From when she was little, she enjoys studying.

She was the best student in every school she went to.

Yingying was the very first member of the family who ever went to a university, and that's where she met her boyfriend, Xiaoling Hou.

They were both great students.

They graduated number one and number two, Xiaolin being number one.

When you look at those videos of Yingying getting into that car, what did you think when you saw that video?

You thought the police, the university, just was not doing enough?