Documents obtained by The Post have shed new light on the scale of Chinese investment connected with the controversial Boeung Kak lake real estate project...The US$98 million project in northern Phnom Penh is the smallest of Mongolia Erdos Hongjun Holding Group’s planned investments...Starting in...2012, the Chinese company and a Cambodian partner [Cambodia International Development Group] plan to invest roughly $1.9 billion in aluminum mining and energy projects...NGOs have been unable to reach the Chinese company since protests erupted over forced evictions at Boeung Kak lake in 2008...Several human rights organisations, including Bridges Across Borders and the Business and Human Rights Resource Center, have reportedly tried unsuccessfully to reach Erdos and their partners...The Post...contacted Erdos Group...but was not granted interviews with officials at Ordos City’s Reform and Development Commission and its representative for Cambodia International Investment Development Group based in China’s Guangdong province.