Uzbek President Islam Karimov concludes a two-day visit to China on August 20 following talks with Chinese President Xi Jinping.
The two leaders on August 19 reportedly approved a five-year development plan for bilateral relations and signed a joint declaration.
They also witnessed the signing of several documents aimed at fostering technological and economic cooperation, as well as deals worth more than $6 billion in the energy, high technology, banking, and financial sectors.
China's Xinhua news agency says Karimov and Xi also agreed to give priority to the construction of part of a natural-gas pipeline network linking China and former Soviet republics in Central Asia.
Karimov last met the Chinese president in May on the sidelines of a summit in Shanghai.
The Russian news agency Interfax says Uzbek-Chinese trade stood at $5.2 billion in 2013 and topped $2.6 billion from January-June 2014.
Based on reporting by Interfax and Xinhua