"Question: Recently you mentioned that certain words in your writings need to be revised. Can we directly paste the correct words over the old ones, instead of scratching the old ones off?

Teacher: Actually it's fine however you do it, as long as you correct them. The students in Mainland China don't have the means to do this. I know that in the past, most of the books printed in Mainland China used newsprint, and it was pretty thick, so it won't be damaged if you scratch it lightly with a thin blade. I'm just giving you an idea. You don't have to do it that way. (Audience laughs)"