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A crowd of people struggle to get on a city bus in Xi'an, capital of northwestern China's Shaanxi province on Sunday, March 11, demonstrating why experts say "Queue Days" should be introduced across China. The same day was declared the second official "Queue Day" in Beijing to remind residents of the benefits of lining up for things. Experts say the days should be introduced in other cities to provide people with a better understanding of social etiquette. [Xinhua]