Former South African President Jacob Zuma and former Chinese President Hu Jintao upgraded bilateral ties between the two countries on 24 August 2010, when they signed the Beijing Agreement, which elevated South Africa's earlier "strategic partnership" with China to the higher level of "comprehensive strategic partnership" in both economic and political affairs, including the strengthening of exchanges between their respective ruling parties and legislatures. In April 2011, South Africa formally joined the Brazil-Russia-India-China (BRICS) grouping of countries, identified by Zuma as the country's largest trading partners, and also the largest trading partners with Africa as a whole. Zuma asserted that BRICS member countries would also work with each other through the UN, the Group of Twenty (G20) and the India, Brazil South Africa (IBSA) forum.