The Double Tenth Agreement was an agreement between the Kuomintang (KMT) and the Chinese Communist Party (CCP) that was concluded on 10 October 1945 (the Double Ten Day of the Republic of China) after 43 days of negotiations. CCP Chairman Mao Zedong and United States Ambassador to China Patrick J. Hurley flew together to Chungking on 27 August 1945 to begin the negotiations. The outcome was that the CCP acknowledged the KMT as the legitimate government, while the KMT in return recognised the CCP as a legitimate opposition party. The Shangdang Campaign, which began on 10 September, came to an end on 12 October as a result of the announcement of the agreement.