Since the duty and penalty tax are so high.Will you declare the import amount lower when you import the miner from China? What if the customs notice it, will there be more trouble?
Am one person that discourages importations of items that are being locally produced also at the home country as this could gradually affects the import county's economy drastically bad. Why import miners from another country just to escape tax and for low fees when it's the home country that would bear the brunt of the environmental mining effects?
Make the rules your friend by following it rightly!