Pretty obvious because they have total control of the hashing and mining power. They have like 60-80% of the bitcoin mining farms so its no surprise that they have put a significant dent in the market price in the last couple of weeks. And you have to remember that China is one of the earliest adopters of bitcoin as well so no wonder that the news coming from them has somewhat crash the price. But let's move forward and forgot the influence that the Chinese has to bitcoin. Bitcoin is unstoppable and even without them, bitcoin can still survived.