shy facing the camera for the first time, but she still greeted everyone with the greatest enthusiasm."Actually, this design is a bit conservative. Let me show you how I designed it."Yin Panyan took a..., no exception."Alright, then you go and take Grandma outside for a look."Li Yusa was so excited, she wanted to help her grandma sit down on the wheelchair. But she found that her grandma was too heav...