When alkaline sodium hydroxide meets phenolphthalein, the stupid thing it does is a dazzling red color that cannot be faded no matter how it deteriorates in the air. But when encountering acidic dilute hydrochloric acid, a violent reaction occurs, and the stupid things you have done will slowly be washed away, and you will become clear.
"You and I are like the neutralization reaction of sodium hydroxide meeting hydrochloric acid. No one is more in tune with us than us."
Intention: