Where does the smell of the hotel lobby come from? What is the principle?

At present, Guangdong, the industrial cluster of hotel fragrance blending market, is also a mixed bag. More than a dozen large and small hotel perfumers are concentrated in Guangzhou and Shenzhen. Most of them have no core technology and are simply assembled by purchasing parts. The quality of hotel perfumers is uneven, and the service life cannot be guaranteed, and some of them are scrapped after less than one year of use. Many low-priced and inferior hotel perfuming machine products have brought great influence to perfuming machine industry.