First of all, we usually buy gold and alloy from the suppliers that specified in the documents of certificate that Sritida sent to you previously. For refinery, we also do it out side. I will have Sritida send you the document from the refinery company. This is what we basically submit to other customers. In the hand, we have never had any of auditor come directly to our factory for audit. So we would like to ask to see some example of the documents if some of your vendors had done this to you before. And what is the condition? Who support on the expenses?