One day in 2015, Zhang Zong of Shandong Universal Big Bear Food Co., Ltd. searched the Internet for "food packaging boxes" to find a sensitive packaging, and ordered the first batch of black sugar food packaging boxes. Shortly after the delivery, Mr. Zhang called again: "Xiaoxia, we are in urgent need of the second batch of goods. I immediately sent an order to you. I didn't expect the sales volume to be so good with the food packaging boxes you designed. The food packaging boxes are not enough. You must help us with the one-Min packaging and deliver the goods to me as soon as possible!" From Mr. Zhang's general urgency. As you can imagine, Zhang's total sales of black sugar are very good.