The general expectation had been for 8.4% growth but strong rumours overnight suggested that the actual number will be much higher. There has certainly been some strong trade and loans data out of China this week but the market may be getting a little over-excited with expectations of 9.0%.
Any number coming in around 8.5% will probably put a small dampener on risk sentiment, after the strong overnight rally, and lead to a small fall in the AUD/USD whilst it will now take a number of 9.0%+ to cause the risk trades to go on another bullish run.