ke"On the phone, Grandpa's voice trembled with excitement and joy.Yu Yan raised her smile gently and said, "No, learning is my duty. There's no need for rewards."First Domain: wap."Oh my granddaughter... was already so mature fifteen years ago. ""...it's just not widely used domestically."Actually, in some other countries, some companies, and some places, implanting chips has already become popular.I...