There is a smell in the bag of Jingdong Express.

Hello, I would like to ask what is the reason for the fragrance in the bag of Jingdong Express? The reason why the bags of Jingdong Express are fragrant is because of poor air permeability. Poor air permeability will make it difficult for the smell in the bag of Jingdong Express to circulate, which will lead to the accumulation of smell in the bag and the fragrance in the bag of Jingdong Express.