our return ratio is less than 0.2% according to our latest RMA statistics, but we still think that this ratio cannot meet our requirements on products quality. Our engineering team are working with his best effert to tackle the technical issues to control the RMA ratio within 0.1%. Based on trust, we will give new products replacement for factory defects after customers inform us about it without actually getting them back to China at first place, we will decide if it's worth sending them back after 1 years.