Video: Do ​​you understand the symbol No.2?

Every sign has its own meaning, not "I like it, then I print it" on the pencil.

Picture 1 of Video: Do ​​you understand the symbol No.2?
No.2 sign is often seen on pencils.

Anyone who used a pencil should have noticed the No.2 symbol printed on the pen body like this. Similar to the three YKK letters on the zipper, the No.2 symbol is so popular that . it is considered obvious and no one knows what it represents.

So what is the real meaning of the mysterious symbol above? And why is the No.2 pencil the most popular in the world, not the No.1, No.3 or any other number?

The answer lies entirely in the video below: