China's economy is not going to crash anytime in the near future. Their economical growth is based on their current production and not on their future productive capacity
Right now, the government of China is pumping money out to stabilize the stock markets.
They are basically doing what the USA has been doing for a few years, printing money, lowering interest rates, etc.
Sounds like the US you're describing. And like the US, the Chinese economy will experience crashes and recessions. Yet, the overall trend will be growth that will outpace the US, which is on an antibusiness trend.