I am not a short, but a person that questions how a chinese company listed in the USA conducts its business. I will give your questions some replies.
-how many projects did xin execute during past 5 years? Does not matter. What happened has already been factored into the company and the pps.
-how many units were sold? again, does not matter. It's like saying how much money did Bernie "manage"...
-how many complaints do you actually know of? Only a bunch of late since I looked into the company this weekend.
-what is normal claim percentage going for average is dumb. each case needs to be evaluated on its own merit or the lack of.
-whats is on xin balance sheet for claim liabilities? Not sure, you tell us. What is difficult to put in numbers is the ill will generated right now as we speak in china. To me, those 2 buildings are total loss but you may have different opinion. In fact, i think the damage is worse than the cost of those 2 buildings alone, because reputation may be tarnished.