As other auxiliary facilities of the hotel, cinemas, chess rooms, KTV and other leisure places cannot be ignored because of the large flow of people, and the influence of smoke, human waste gas and sharply rising CO2 concentration on customers is also quite serious. The fresh air system from iPeson Hotel in Germany has strong air volume and can purify thousands of square meters of activity space; Combined with H 13 medical grade Hepa filter and ultraviolet sterilization function, it still has zero tolerance for PM2.5, formaldehyde, odor and virus in the air. Aipinsheng fresh air system extends to Germany's "German Industry 4.0", which is exquisite and environmentally friendly alloy material and durable, further embodying the mechanical extension of German craftsman spirit.