2, refreshing: refers to what you see. What I saw and heard was completely different from before, which made people feel fresh.
3, spit out the old and get new: in the past, when people breathe, they spit out polluted air and breathe in fresh air. Nowadays, it is often compared to discard the old bad and absorb the new good.
4. Change the land in another day: it is to completely change the original appearance, transform society and transform nature.