In November 2005, Chinese President Hu Jintao and former Chilean President Ricardo Lagos witnessed the signing of the China-Chile Free Trade Agreement. The Agreement entered into force in October 2006. Under the Agreement, China and Chile will extend zero duty treatment phase by phase to cover 97 percent of products in ten-year time. The two countries will also further strengthen exchange and cooperation in such areas as economy, SMEs, culture, education, science and technology, and environmental protection. On April 13, 2008, Chinese President Hu Jintao and Chilean President Michelle Bachelet witnessed the signing of The Supplementary Agreement on Trade in Services of the Free Trade Agreement between the Government of the People's Republic of China and the Government of the Republic of Chile, in Sanya, Hainan Province.