People know me know I have been in XIN for a while and left a few months ago. Previously, XIN's trading pattern is going up very quickly and going down slowly and painfully. XIN typically surge when the volume is huge. This time is different. XIN started to have strength in normal volume.
I theory is previously XIN went up substantially in couple of days by market marker manipulations. They trade their own shares frequently in a given time of the day to make the run quick and substantial. This time, XIN went up with normal volume and spread nicely during the trading day. We know long institutions like buying shares slowly without interrupting share price too much. That's exactly what's happening now.