Chinese President Xi Jinping and Russian President Vladimir Putin attend a roundtable meeting on regional cooperation between the two countries on the sidelines of the fourth Eastern Economic Forum in Vladivostok, Russia, Sept. 11, 2018. (Xinhua/Rao Aimin)

VLADIVOSTOK, Russia, Sept. 11 (Xinhua) -- Chinese President Xi Jinping and his Russian counterpart, Vladimir Putin, on Tuesday called for promoting sub-national cooperation to cement the bilateral relations and benefit the two peoples.

The two heads of state made the remarks while attending a roundtable meeting on regional cooperation between the two countries on the sidelines of the fourth Eastern Economic Forum, which is running from Tuesday to Thursday in Vladivostok in Russia's Far East.