In this experiment, PM2.5 and carbon monoxide levels in a room are tested before and after the lighting of a cigarette.

Li Yin Fei and Li Ding explain how to implement "Operation Empty Plate."

This video explains the origin of the term, "Windy Mansion."

Li Yin Fei and Li Ding discuss "Operation Empty Plate."

Jia Dao's tragic life was revered after his death.

By chance, Jia Dao meets a scholar who convinces him to aspire to a bureaucratic position.

Professor Fan tells us how we can nurture a healthy mind and how it will improve our lives.

Li Yin Fei and Li Ding discuss conserving energy and reducing emissions.

Should there be individuality in a traditional group performance?

Li Yin Fei and Li Ding demonstrate the benefits of not lighting firecrackers to welcome the New Year.

Li Yin Fei and Li Ding show how to refuse to light firecrackers for the New Year.

Professor Fan discusses the idea of "Ren" and its importance in maintaining healthy relationships.

Li Yin Fei and Li Ding perform their crosstalk act the Spring Festival Gala.

This video is a demonstration of acupoint selection.

In the past, Ming dynasty furniture was a meticulous and laborious craft. Has that changed?

This video discusses the vaccine for hepatitis B.

Where does the term "Tui Qiao" (literally to "Push and knock") come from?

Has knowledge taken away our perception of beauty?

Can we teach beauty?

What are Jiang Xun's fans like?

A guest from an American university speaks on education equality and fairness.

Emperor Kangxi played a major role in introducing Christianity into China.

This video details the history of Christianity in China, namely the influential figures, Matteo Ricci and Xu Guangqi.

Why doesn't China have a film rating system similar to the United States or other countries?