Yesterday Shanghai surged 5%:
It was no doubt helped by the poor weekend data which raises expectations of more stimulus. Remember that this bull market is liquidity not profits driven. FTAlpahville also has a comparison on past attempts to stabilise stock markets with public money:
The encouraging historical example to draw on is Hong Kong in August 1998, following the Asian Crisis where a series of currency pegs in the region came under attack, and capital flight was followed by slumping asset prices.