If you have anything you don't need a lot at home, or you are going to move out, leaving a lot of stuff in the previous place, why not sharing them with others. You can put your second hand things in this market. You can also find something you need with a good price!
As a foreigner, there are must lots of questions you meet in your daily life in Beijing! Some of them make you confused, some of them drive you crazy! Don't worry about that! You can find the answer here! You can also let us know your questions!