yes,there are some issues,but i think there some divergences for the issue and payment...1st. these issues are warranty problems not quality problems;2nd,we asked the progress payment not the wanrranty payment;3rd,issues we are solving all the time before the programe were constructing until now;and we must solve all issues before we apply the warranty payment.4th,according the contract we should get the pay after all equipment installed but now we haven't got...at last,these issues we still solve and the payment also we ask! so issue is issue and payment is payment ,they are two things ;don't mix them.