1, one or two pieces of paper, seemingly insignificant, but every little makes a mickle, and it is also a waste to use them up.

You like reading best at ordinary times, and you know how difficult it is to make paper. But you won't feel sad about throwing away an unused exercise book. It's not a question of how much it costs. In the long run, you will develop a bad habit of being extravagant and not knowing how to save. Saving is the virtue of being a man.