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Publicity language of civilized subway (public service advertisement)

Hello, the following are all my original works:

The subway is not a bottomless pit, and it hurts to enter the door. Please don't be crowded in and out of the gate!

The subway is running at a high speed, so you can't get off at the same time. Please don't smoke or fart in the carriage!

It is difficult for old people to take the subway once in their lives. Please give your seat to the old people and let them experience the novelty!

Thank you for your adoption!