There is a highway between A and B. Xiaoming rides a bike from A to B and Xiaohua rides a motorcycle from B to A. After 60 minutes, they meet for the first time. After meeting, they moved on. Xiaohua returned immediately after arriving at A, caught up with Xiaoming and Xiaohua after the first meeting, and returned immediately after arriving at B, and this continued until Xiaoming arrived at B, and Xiaohua rode a motorcycle from A to B.