Lu Xun wrote with grief and indignation: It's not the young who write commemorations for the old, but in the past 30 years, I have witnessed the blood of many young people, silting up layers by layers, burying me so that I can't breathe. I can only use such pen and ink to write a few articles, which can be regarded as digging a small hole from the soil and extending my mouth to the stump. What kind of world is this?
It reflects that Mr. Lu Xun is in an extremely dangerous and repressive environment is not accurate in the understanding of the word extending mouth to the stump above.