Russia and China are working on supplies of Russian Sukhoi Su-35 to China, the supplies are still due, head of the federal authority on the military-technical cooperation Alexander Fomin told reporters on Saturday.

The official is a member of the delegation of Russia’s President Vladimir Putin to the APEC summit in Peru. The delegation made a stop in Portugal’s capital city.

"Still due," he said. "But work on the contract continues, adaptation (of aircraft) continues.".