China has expressed concern on the planned carbon tax by the Australia government, which the Chinese government said might be a step back for the country's mining boom.

Chinese diplomat Ouyang Cheng said as quoted by the Sydney Morning Herald that Chinese companies were concerned about the Gillard government's mining tax plans, and called for less red tape in the minerals and energy sector.

''There are some worries from the Chinese mining enterprises regarding newly released MRRT [minerals resource rent tax] bill,'' Chinese diplomat Ouyang Cheng said as quoted by the Sydney Morning Herald

Mr Cheng said he hopes this would not be a step back from what has been originally planned as steady economic reforms that would encourage more investments in the Australian economy.

''We are hoping that Australia government could make more efforts to address the concerns and solve the difficulties of the Chinese enterprises in Australia during their projects' application and operation.''

Mr Cheng - recently appointed as the second secretary for economic and commercial affairs at the Chinese embassy in Canberra - called for the establishment of a special forum to facilitate more Chinese investments in Australia.