On Children’s Day, the cooperative project of BJMTR and National Library M-Library hosted a reading promotion of “Hearing the Childhood”. M-Library recommended audio book for the first time which is difference from past promotions that recommended E-book or picture book, and set up a theme library at PingAnLi staion in which passengers could listen 114 stories in 61 classic books through scanning the QR code during their journey. This is an interesting gift to children and adult passengers since the audio books are more attractive.