◎视觉中国 Chinese tourists enjoy a tour on the river Cam at the University of Cambridge, UK, during the summer of 2017.Photo/VCG DF2Id(Malaysia) As an old saying goes-"old habits die hard", it would be hard for some people to change their bad behaviors like spitting, littering, jumping queues, and speaking loudly in public placesChinese tourists enjoy a tour on the River Cam at the University of Cambridge, UK, during the summer of 2017. [Photo/VCG] DF21d (Malaysia) As an old saying goes - "old habits die hard", it would be hard for some people to change their bad behaviors like spitting, littering, jumping queues, and speaking loudly in public places