Shanghai aluminium futures fell over 3 percent in afternoon trade to a 14,990 yuan ($2,400) a tonne, exchange data exchange showed on Tuesday.
The most-active October aluminium contract on the Shanghai Futures Exchange was down 3.13 percent at 15,035 yuan by 0640 GMT, after hitting a low of 14,990.
Chinese aluminium prices have been pressured by news that local governments were supporting high-cost aluminium smelters with subsidies to boost local GDP.
($1 = 6.3633 Chinese yuan)