Language is the ultimate key to the sustainable prosperity of mankind.
In any civilization, the importance of language and conversation is always appearance in ancient proverbs.
A language without legs can finish the five oceans and the six continents without any power, and can go back and forth between the past and the future with the time machine.
The conversation is like giving a transfusion to a partner.
Antioxidants which are well-healed and heavily armed with nutrients make all people healthy, but viruses that are poisoned by pollutants transfuse deadly poisons and destroy all things on a daily basis.
Invisible bullets can penetrate the heart immediately while the sharp blade cuts the flesh with a slow swing.