A greeting is the beginning of a smile.

I am a university student in the dormitory, before knowing about this campaign, I rarely greeted the security guards or the cleaning ladies because they always had a very grumpy and unpleasant face. But since practicing greeting and thanking the ladies with a smile on my face for 50 days. The atmosphere has changed amazingly. There are more guards and cleaning ladies, and other students have gradually greeted the security guards and cleaning ladies. Just a simple greeting and gesture but it has a magical influence and spread.