Just invested myself and got myself a 10% bonus, due to investing with ETH.
With BTC I'd have gotten a 20% bonus.
No, the bonus is equal and does not depend on the way of investing.
It depends on sum reached:
(Phase 1):
- First $10M (TIER 1) - 10% Bonus
- Second $10M (TIER 2) – 5% Bonus
- Third $10M (TIER 3) – 0% Bonus
Phase 2:
- First $10M (TIER 1) - 10% Bonus
- Second $10M (TIER 2) – 0% Bonus
And contribution size: $100K-$300K - 5%, >$300K - 10%
These bonuses are independent and can be summed up.
Can citizens of China participate in it?
As far as I know taking part in ICOs is officially banned in China.