BEIJING (Reuters) - China and Russia will sign nuclear energy, aviation and space deals next week during a visit to China by Russian Prime Minister Dmitry Medvedev, a senior Chinese diplomat said on Tuesday.

Medvedev will be in China to attend a summit of prime ministers from the Shanghai Cooperation Organization, a Chinese and Russia-lead security block, in the central Chinese city of Zhengzhou.

Chinese Vice Foreign Minister Cheng Guoping gave no details on the agreements to be signed with Medvedev.

The Shanghai Cooperation Organization groups China, Russia and the former Soviet republics of Tajikistan, Uzbekistan, Kazakhstan and Kyrgyzstan, while India, Pakistan, Iran, Afghanistan and Mongolia are observers.

Medvedev will also visit Beijing, and the eastern city of Hangzhou where he will attend an Internet forum, Cheng added.

China and Russia have close business, security and diplomatic ties. They also tend to vote together as veto-holding permanent members of U.N. Security Council.

Last month, China agreed to buy 24 Sukhoi Su-35 fighter jets from Russia in a deal worth more than $2 billion.