The tourist attraction is open at midnight. I asked Xiao Liu, when everyone else is sleeping during the dark hours of the night, what are you still doing? I was deliberately asking this. Not sleeping at night, what kind of mischief could you be up to? Xiao Liu said, "Sleep? What sleep? I've been restless all night. If you don't believe me, ask her." He then pointed to a beautiful lady accompanying them named Xiao Ai. Before he even finished speaking, everyone burst into laughter. Only beautiful Xiao Ai knows what Xiao Liu has been up to at night. The meaning here is much richer.