Middle-type Luxury Model can be fit in the middle part of bus. It has several advantages:
1. Terseness interior design, fine layout, with functions but easy to use
2. Automatic control system for the lights, hand washing sensor, toilet seat and seat cover adjustment, discharge for toilet with air exchange
3. Negative vacuum pressure system for gathering, consult to the facilities used in aircraft, use vacuum pump and negative vacuum toilet in incept, ensure the toilet compartment clear and with fresh air all time