no people are silent because you haven't checked the Chinese exchanges before making this topic. if you do check them you will see that the biggest ones only have bitcoin and litecoin listed. they don't even have any altcoin for trading apart from their small exchanges!
and also Chinese have always been significant but not the way it was advertised. people imagined they have full control over everything and if they wish they could kill bitcoin in an instant and if they wished they could pump it to 10 million dollar!
but in reality, Chinese market has always been a big market because of the large population of China and the fact that many of them are into trading. but they are just one market in the whole world.
do then have an effect? of course they do.
is it as big as people thing? not at all.
the big 3 only having BTC and LTC:here is Huobi:
https://coinmarketcap.com/exchanges/huobi/OkCoin:
https://coinmarketcap.com/exchanges/okcoin-cn/BTCC:
https://coinmarketcap.com/exchanges/btcc/