The daily hustle and bustle of shipping at the factory is probably what most people like. But there are some exceptions. We will deliver the goods again today, but I am not happy at all. I think it is because of our unprofessionalism that caused the loss this time. Today, when the customer first contacted me, it was the lack of a large production crusher. Of course, the customer already had a running factory at that time, but he only asked for a main machine. At that time, we didn't ask too much questions and everything was based on the customer's idea. The order went through smoothly. Later, the customer frequently encountered production problems and we found that his own auxiliary parts of hammer mill were too small, which was already the largest model they provided locally. This also allowed us to increase the experience of the customer demand must ask him the reason, during this period for our customers have a certain amount of financial and material loss.