The miners would not do it. They would have shoot themselves on the foot that way. Who would pay them back for their hardwares?

You could say that they would be bribed. But seriously. All of them? That does not work like that. Bribery is a brobe of single idividuals in a centralised system. Decentralised system are immune to bribery. Or almost.

You could say that chineese government would order them to do so. That is more viable, but it would be extremely stupid. That government would make itself a lot of enemies, and no government want to do that - believe me.

In a summary your whole argument is based on a xenophobia. You just fear the chineese because they are different, therefore you wrongly assume they are unpredictable. They are as human as you are, therefore you can rationalise their behaviour.