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'Smoking is Forbidden', 'No spitting' - authoritarian notices like this are now on their way out on public buses in southwest China's Chengdu City.

They are being replaced by much warmer, often amusing signs with cute cartoons.

For example, 'Give up your seat and earn a smile', and ' For the sake of both your health and mine, please don't smoke'.

The passengers are much happier with these new-style friendly notices.