> Neither assumptions are backed by evidence.

To the contrary, there is no evidence to suggest that China has had the spread necessary to kill 3 million people nor any evidence suggesting that they have covered up 3 million deaths.

You might naively think we have no way of checking, but this level of spread would be trivial to infer from antibody tests of people traveling to China. We have seen no indication of a deception anywhere near the scale you are suggesting.