TEHRAN, June 16 (RIA Novosti) - Iran's president said Friday he was happy with the results of his visit to China for a summit of the Shanghai Cooperation Organization.

Iran has observer status at the SCO, which unites Russia, China and four ex-Soviet republics in Central Asia as full members.

"In the course of bilateral and tripartite meetings with the leaders of China, Russia, Pakistan, Afghanistan, Tajikistan, and Kazakhstan, we discussed various problems of mutual interest, achieving good results," Mahmoud Ahmadinejad said at Tehran airport after his return from Shanghai.

"The SCO is an important and influential international and regional organization. Its member countries have an aggregate population exceeding more than half the world's population," he said.