My partner and I live in the Wangjing district of Beijing. He has a day off work on Wednesday and seeing as the weather here has been getting nicer we have decided we would like to go somewhere out of the city for a day trip. We hae visited all the usual touristy areas such as the Great Wall at Badaling and The Summer Palace. We were thinking about something like a day at the beach. Can anyone recommend anything that's not too far from Beijing that would make a good day out?