User profiling in lianjia.com with lambda architecture, including real-time user online behavior collecting & preference tagging, cross-device user identification, some user behavior prediction, etc.
https://docs.google.com/presentation/d/1s82pxtCsOOxMiF8D6Y_-OT_iqAKV8nF1myLTJrscpSg/edit?usp=sharing