I don't think there is an accurate way of counting as to how many people use Bitcoin other than a compulsory survey. You take a global survey and ask each and every person in the world if they use or know bitcoin.
Not you only but we all, this is because bitcoin is anonymous so it is difficult to find valid data. I think, bitcoin users no more than 5 percent and the remainder is in china.
You really are that confident that china is the biggest users of bitcoin, you just said and contradicting words about you cannot trace or find a valid data. How come you arrive that figure?