???????????????????????? ???????????? 1.)Pipe ends aligned 2.)The button has directly aligned the holes 3.)Push the button. Hear a click sound after inserting a section 4.)Make sure it can not be pulled ?????????? ???????????? ?? Do not exercise for an hour after a meal ?? Do not put a hula hoop on your neck ?? Children need to use it in the custody of the adults ?? Women are prohibited from using during pregnancy and menstruation ???????????????? ???????? ?? 4-6 times a week ?? 2-3 groups at a time, 20-30 minutes per group ?? 10 minutes rest between each group ?? Do not exceed 45 minutes in one training session