Because express delivery is now the main channel for online transactions, there will be more express delivery every day and more problems. Many couriers go to work directly without training, which leads to many classification errors. There are also recent weather factors or cheap express delivery, which naturally increases the time, but it can be received stably within 2 ~ 5 days. Now I only ask the seller to send me SF Express or Shentong Express, because I know that SF Express and Shentong are both special planes.