Beijing property market : I have read some of MLS (multi-level system of listed inventory) reports, and 21 real estate companies is the largest MLS customers, which you can specifically describe?

• 北京楼市：我看过一些关于MLS（多级上市房源系统）的报道，而21世纪不动产又是MLS公司最大的客户，对此您能具体介绍一下吗？