Their loss 

China is the country with the largest population and perhaps that is the reason why china is so in fluent with the bitcoin prices. China has most of the bitcoin users as the people in china are technology friendly and have a good source of income through bitcoins. I don't even think that the rumors about china banning bitcoin will be true as there is no such huge reason behind bitcoins to b banned.

Either china would launch a special coins to be used there as they have always invented a second option for each thing that is essential. But it is not possible to gain as much reputation as bitcoins. Perhaps the rumors are fake as the similar were seen in 2013.

Currently my most electronic part are import from China so yeah China can do anything with major market exposure.
China may the most wanted investor if they want to build their start-up company and as we can see when China able use bitcoin , global market got affect quite much

Because China is the world's second-largest market economy, the large population and rich people invest in bitcoin. Influence and develop to bitcoin. So if China prohibits bitcoin, it will have a big impact on the bitcoin currency.

That's now just a myth that china is influental to the price, they lost all their capital and now their exchanges trading "dust" amount of 24h volume, nothing to be worried here.
but many people still think about hashpower which china contribute, don't know about the future of bitcoin if china going to banned the mining activities there.

as far as I know China is very influential on bitcoin, because chances are half of the shares owned by bitcoin may belong to china, and china has established cooperation.
or on the contrary the reason is probably most bitcoin users are chinese. then it will also affect the bitcoin.

Becasue there are too many mining activities in china. And also too many bitcoin holders there.

the answer is simple. there are a lot of buisnessmens who invest in it. Yes, they are maybe more interested new inventions, you know)

They have been a major percentage of miners, mining pools, holders of large amounts and lots of the best technologies in crypto came from China.
Biggest spenders often are Chinese  and up until recently it seemed like China had the controlling hand on the network but ...
It isn't so anymore.