Good boy bike 20 15. According to the popular science website of prams, gb is a children's product of Good Boy Children's Products Co., Ltd., and its Chinese name is Good Boy, which is also the abbreviation of Good Boy. 20 15 indicates the model year, and the good boy bicycle is 20 15. Gb Good boy children's bicycle is made of thick high carbon steel, the frame is durable, the handlebar saddle can be adjusted to accompany the baby to grow up happily, and the high elastic saddle and cushion are comfortable for shock absorption.