Does anyone know that Huangdao 3 15 intervention is effective? I bought an air-conditioning fan from Zhongze Domestic Products. The cooling effect is not good, but the noise area is not small. I want to return it. First of all, you can't return it without quality problems. Secondly, 3 15 didn't come just after you asked him. It's not that easy. It is estimated that ordinary people don't even know where the door is in 3 15. Therefore, if you buy for a short time, it will not affect the secondary sales or negotiate with the mall for redemption. Refund may be a little hung up.