This 3 sentence summary provides the high level and essential information from the document: Transnet SOC Ltd issued tenders in 2012 for 1064 locomotives where China South Rail and China North Rail were successful bidders but prices were illegally inflated in 2014 through the involvement of Regiments Capital and Trillian Capital, resulting in billions being stolen from Transnet through corruption. There is evidence that China South and North Rail were involved in this corruption. The letter requests that the Chinese Ambassador refer the two Chinese companies to Chinese law enforcement agencies to investigate their involvement in the Transnet locomotive tender corruption.