How clean indoor air is becoming China's latest luxury must-have
The newly opened luxury Cordis hotel looks much like many other high-end hotels in Shanghai, with its glass-sided swimming pool, vast twin ballrooms and upscale spa. But the first Cordis hotel on mainland China boasts something that is genuinely rare in big Chinese cities: clean indoor air. Modest occupancy rates in the megacity's 5,000-plus hotels mean operators have been desperately…