Is this the world's largest greenest hotel?

"Inspired by the sun dial, a huge 75.000 m2 building constructed just outside of the Dezhou, China, proudly claims to be the largest solar-powered structure in the world. The fan-like roof of the facility, covered with about 5.000 m2 solar panels.
The “Sun-Moon Mansion” building, built by Himin Group, is part of the Solar Valley in Dezhou, what China is calling “The Biggest Solar Energy Production Base in the Whole World”
The solar roof of the complex enables comprehensive utilization of solar energy with photothermal, photovoltaic and energy-saving technologies which boosts its energy-saving efficiency up to 88%.
The obtained saving of almost 2,5 tons standard coal, 6,6 million kWh electricity and over 8,6 tons reduction in emission of pollutant are quite an impressive and very green numbers."
Info Source: energy-today.biz

And they have a commercial kitchen cooking food using an array of evacuated tube solar cookers, see here: