Hi Xiaoguang,As mentioned by Huimin, we need to rework the 21 GOB CS units that are currently in the Shanghai warehouse. We are working with the Madison QA team to have the work instructions approved which should be coming up soon. We will need help locally at the Shanghai warehouse to identify the units and have the labels reworked. We plan to send you the instructions along with the labels etc.Am assuming you will be our single point of contact that we can use to complete this (of course very likely you will have a team working with you). Can you please let us know if otherwise? We will share the details accordingly.Can you please let us know?