How to reply to a thank-you note from a stranger?

In life, we have met the help of strangers, won the encouragement of strangers, and warmed ourselves with the kindness of strangers. Treating strangers gently should be the warmest feeling in the world. I want to say to the strangers who have helped me: I want to say thank you for your warmth. I hope we will be treated warmly and treated warmly; Dear strangers, even if you don't know each other, I still believe you have a good story. Don't be depressed about the lighting in May. In this world, someone wants to be your star.