Seems like you've dealt with China 
That's exactly correct. They also have "high water season" which forces to move miners around a lot. They even build unofficial secret hydro power plants, where conditions are not that great.
Also, the majority of mining operations were near 'water' at places with high humidity, getting a used miner that does not have some sort of corrosion on it is not normal, a long story short, the majority of used miners in China are ABUSED and many do not even work.
That's exactly correct. They also have "high water season" which forces to move miners around a lot. They even build unofficial secret hydro power plants, where conditions are not that great.Also, the majority of mining operations were near 'water' at places with high humidity, getting a used miner that does not have some sort of corrosion on it is not normal, a long story short, the majority of used miners in China are ABUSED and many do not even work.