The social experiment continues with a twist.

Papi Jiang interviews residents of Beijing.

Papi Jiang asks residents in Beijing to determine when they miss their hometowns the most.

The tables now turn on Papi Jiang.

How old are the people born in the 80's and 90's?

Can those born in the 80's and 90's celebrate Children's Day?

What's special about those born in the 80's and 90's?

What kinds of dreams do people born in the 2000's have?

This video explains why a honeybee dies after stinging someone.

This video explains why we shouldn't eat fruit that has gone bad.

This video explains why picking our noses not only doesn't look nice, but can also be harmful to our health.

This video explains the different circumstances under which hair might fall out.

This video explains how giraffes evolved to have the long necks they have today.

The giraffe's long neck serves many interesting functions.

This video explains why fresh vegetables are important to the body's overall health.

This video explains why a fish's body is covered in mucus.

This video talks about how to build self-confidence. Don't mind what other people think of you and just be yourself.

This video talks about how to build self-confidence. Don't mind what other people think of you and just be yourself.

To waste or not to waste: that is the question.

There is more than one way to solve a problem. Look at things from different perspectives and maybe you'll be able to come up with even better solutions.

Being kind is a choice. Be kind to the environment because our future generations will still have to live in it.

Not a Common Day: It all starts with a simple greeting on a beautiful morning... Learn the vocabulary of a very basic introduction in this video.

On their first date, Tim asks Nini about her family background and life.

Nini learns that Tim is a music composer and Tim shares a song he created with her.