China-Kazakhstan Khorgos International Border Cooperation Center is an important cooperation project reached by leaders of China and Kazakhstan in 2003. The two countries officially signed an agreement in 2005. China and Kazakhstan jointly established China-Kazakhstan Khorgos International Border Cooperation in 2006. The center is the first cross-border border cooperation zone established by China and other countries, with a total area of 5.60 square kilometers, of which the Chinese area is 3.43 square kilometers and the Kazakh area is 2.17 square kilometers. In April 2012, it officially closed its operations and implemented a "domestic customs clearance" management model with front-line deregulation and second-line supervision. The main functions are trade negotiations, merchandise display and sales, warehousing and transportation, hotels and restaurants, commercial service facilities, financial services, and holding various regional international economic and trade fairs.