Shanghai Public Transportation

On the escalators at an unidentified Line 4 station platform, Ditiezu poster Akula sighted a novelty:

Aha, you say, I've seen these before! Carrefour uses escalator handrail covers to advertise products at their store.

But before you dismiss these, notice what unique function they are serving. The handrail cover on the right is green and has handprints printed on it. The handrail cover on the left has a message. What message?

共建和谐社会 关爱弱势群体

Build a harmonious socialist society together
Show love for the members of disadvantaged groups.

公共通道请靠右站

Public passageway, please stand to the right

It's about time the Shanghai metro gave it another go! Let's see if the lesson catches on this time.