SHANGHAI,June 15(Xinhua)-- The Shanghai Cooperation Organization (SCO) holds its sixth annual summit here on Thursday. The following is a chronology of SCO summits.

　　-- June 15, 2001, presidents of China, Kazakhstan Kyrgyzstan, Russia, Tajikistan and Uzbekistan hold the first SCO summit in Shanghai, at which a joint statement is issued to announce Uzbekistan's participation into the "Shanghai Five," the launch of the SCO and the Shanghai convention on crackdown on terrorism, separatism and extremism.

　　-- June 7, 2002, the second SCO summit convenes in Russia's second largest city of St. Petersburg. The documents signed at the summit include the charter of the SCO, the agreement on setting upan anti-terrorism agency and the presidents' declaration charting the regional organization's goals.

　　-- May 29, 2003, the heads of state from the six SCO member states hold their third summit in Moscow to discuss ways to meet challenges and strengthen cooperation in the region. At the summit, consensus is reached on the institutionalization of the regional body and on some major international issues. In a joint declaration, the leaders vow to further develop a comprehensive partnership among the six countries to face new threats and challenges.

　　-- June 17, 2004, the fourth SCO summit meeting is held in Uzbekistan's capital Tashkent. At the summit, presidents of the six SCO member states formally launch the Regional Anti-terrorist Structure and pledge to cooperate in fighting terrorism and new security threats and in strengthening their economic and trade ties.

　　-- July 5, 2005, SCO leaders hold their fifth summit in Astana, capital of Kazakhstan, to discuss measures to strengthen unity and further cooperation in economy, security and people-related affairs. At the summit, agreements are inked for fighting the three "evil forces" of terrorism, separatism and extremism and on assistance in emergency relief in disasters. Enditem