The latest standards of cities issued by the State Council, China's cabinet, have defined cities with a metropolitan area of more than 10 million residents as mega cities.

That would include Shanghai, Beijing, Guangzhou at least in the megacity category.

Do we need the introduction of mega cities in China?

Topic2 Wind Tunnels in BeijingIn its latest effort to tackle air pollution, Beijing plans to channel wind through streets to reduce the urban heat - island effect and blow away the dirty air.

Why such a plan?

Topic3 New standards set for air purifiersA new national standard for air purifiers is set to be unveiled by authorities to bring order to the country's chaotic purifier market.

The draft national standard, which is already made available for public comment, includes more specific metrics for measuring the performance of air purifiers.

Do we need better standards for air purifiers?

Topic4 Cassettes Still Used As Textbook MaterialsWhen we first learn English in primary school, the teachers play cassette tapes in the classroom so we can repeat the content after the recording. Now, this old method is still used in many parts of the country.

Many parents question why their kids still get cassettes as teaching materials which they have no recorders to play them.

Is it a problem?

Topic5 12 Professions That Might Disappear in 10 YearsAccording to a newly issued survey named Fast Forward 2030: The Future of Work and the Workplace, 50% of occupations in corporations today will no longer exist in the next 15 years.

Do you think this is what's going to happen?