2345 riddles and riddles, mankind is getting late and has been rushing to change its old appearance.

People don't talk early until they are thirty, and they have been scrambling to change their old appearance. "Guess a noun."

Mysterious octopus

It's not too early for people to reach thirty.

Standing at 30, standing+early = chapter

I've been trying to change the way I used to be

Fish, fighting for the prefix, the bottom of the word, the old vertical change.

The symbol of 2345 is an octopus.