imo came to her senses and continued the topic she had just mentioned: "I'm sorry, I overlooked this during the design. This metal spiral staircase can create noise when people go up and down stairs.... her head hesitantly.Lian Xing'er helplessly pursed her lips, the next second, she raised the corner of her mouth, clapping her hands and singing: "Happy birthday to you."At this very moment, Lang An...