Billionaire Rinehart Puts Australian Beef Assets Up for Sale James Thornhill, Bloomberg News Cows walk through a field during a cattle drive at a farm in Gunnedah, New South Wales, Australia, on Thursday, May 28, 2020. A growing number of Australia's primary producers are mulling the potential for a further tightening of restrictions on Australia's agricultural exports by China. Two thirds of Australiaâs farm production is exported, with almost one third of this, 28%, going to China, including 18% of Australia's total beef production, according to Australia's National Farmers' Federation. Photographer: David Gray/Bloomberg , Bloomberg (Bloomberg) -- Mining billionaire Gina Rinehart plans to sell a portfolio of seven cattle stations in Australia, looking to cash in on her investment in the properties amid strong global beef demand.