Ctrip is holding another tweet contest and they’ve invited us to be guest judges once again. This time around, the winning tweeter gets a night in the penthouse room of URBN Hotels Shanghai. URBN, located in Jing An, is China’s first carbon-neutral hotel and uses green materials and technology to make your stay as environmentally friendly as possible. Just tweet Ctrip (remember to add the @ctripenglish) with the most creative way to make Shanghai’s environment a little better. We’ll announce the winners next Monday. Happy tweeting and an extra hurrah for minimizing the impact your love of luxury has on the environment!