Is it true that using the automatic swinging yao lan (sarong) can cause damage to the baby brain due to constant swinging motion?

If you wish to use Yao Lan for your baby's sleep, do consider these precautions: 1) Place a mattress under the yaolan so that if your baby falls, he will not hit the floor. 2) Always place the baby into the yaolan on his back and not the front. 3) Do not put any pillows, blankets or bedding in the yaolan to prevent any accidents of suffocation from happening. 4) As your baby grows, ensure that the yaolan is able to accommodate his growing height and weight