Its the beginning of a global recession imo. Its not so much about China as it is about the unwinding of the global carry trade whereby hedge funds have been using low interest/ QE conditions to borrow the low interest currency of one country, then invest it in high yield bonds of another, usually emerging market nation, which creates positive carry. This only works when the dollar is at a reasonable level. If the dollar suddenly goes into a dollar bull market as it has, then the debt associated with the emerging markets where most of the investments are being made puts too much downward pressure on those markets, which generally affects all asset classes.....stocks, bonds, currencies etc.
This has happened at a bizarre time when oil is plummeting because of another perfect storm of circumstances involving Saudi production to rout US shale, Iranian oil coming on line as a result of ending sanctions, yet more Iraqi oil coming online etc.
In a nutshell, we are likely heading towards a significant global recession.