Although Beijing in the 1960s was not as developed as it is in the 21st century, it was much better than the post-apocalyptic world. At least there were no terrifying zombies.,The old man stared at Du Ruo for a few seconds, then muttered with a thoughtful expression:,"Okay," Du Ruo picked up her bag and walked gracefully into the door, "Thank you, Grandpa! But..."。