Thank you for your good question nathanblack and the answer to it has been provided by the company on previous occasion.
The company has established it is own lab on the ground to save on cost and time which reflects on your own line of thinking.
But before that and before Sino was on the picture, they needed independent testing to verify the grades, so they went to independent outsider labs. results of +55% ore grades were established as most of us know!
It is all in the ann!
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