Why find a cooling fan manufacturer to order, the cycle is longer than the retailer

Some customers who buy cooling fans for the first time will say why our production cycle is so long, longer than that of retailers in the market. Why is this happening? First of all, if you look for the stock in the retail market, then people can take the goods away at that time, as long as the inventory specifications may not completely meet the product heat dissipation use, or the air volume is not enough, or the noise is too large, or the line length is wrong, or the lifespan is not ideal Secondly, if he can order it from a retail market, he still needs to find a cooling fan manufacturer to produce it, so the cycle is definitely slower than that of the manufacturer, because there is one more ordering process. Third, the zero activity of a small factory is also better. Large-scale factories have more casual jobs and are fast. They may not have too many processes, and probably the same materials can be used. The performance of the final cooling fan may be different.