Does anyone know any e-mail / website for local authorities in China? Bitmain is sending me DOA units from repair all the time. And now one unit is 2nd DOA. Really not fair from their side, i am paying all shipping and everything so we can bounce back and forward scrap units. And their coupons mean nothing at this point as not only that they dont have anything else for sale but it is questionable that i will even consider ordering anything from them again.