Chapter 147: Household Service Robot "Uncle, I've already traded two mechanical creations with you. Can I get a discount for another exchange? How about a buy-one-get-one-free deal?" Yan Yu suggested with a smile. "Hahaha!" The man laughed, then pointed to his upper right. The opposite screen displayed the other side—probably the direction opposite to him. "Check the time, little girl. This time, the platform is only open for thirty minutes. Your shelf is still full of leftovers from the last…