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?
In my opinion, it's best to leave the authorities off of your trouble radar. Mining margins are already thin, and while the duty fees do take a sizeable amount from your profits, it's a one-time payment and as such it can be offset over several months by amortized mining profits.
Lying to the authorities about the quantity of miners will incur even more penalties on you if they find out the true quantity of miners you're importing. Never try to cheat like that (unless you're sending them to some country with lax inspection and customs duties then you might get away with that, e.g. some african country).