According to previous estimates, about 300,000 troops were set to participate in the maneuvers.
Russian President Vladimir Putin promised to strengthen his nation's military during remarks made following Russia's largest-ever war games exercises with neighboring China. A small contingent of Mongolian troops is taking part as well.
"Russia is a peace-loving state, we do not have and can not have any aggressive plans, Our foreign policy is aimed at (development of) the constructive cooperation with all the countries interested in that", Putin said while attending the exercises.
Analysts say that China's participation - the first ever country not from the former Soviet Union to be invited - shows the depth of the Asian neighbours' friendship.
He commended them for their "high-level performance" in the "most active stage" of Vostok-2018.
The war games last all week and are being viewed with concern by NATO
Sergei Shoigu and his Chinese counterpart Wei Fenghe visited the Tsugol firing range in eastern Siberia where the troops were taking part in a joint exercise.
"Therefore we are going to further strengthen our armed forces, supply them with the latest generations of weapons and equipment, develop global military partnership", he added.
For example, a surprise inspection of the Northern Fleet took place in mid-August, while similar inspections of the Central and Eastern military districts happened later that month.
Major drills are now being staged in eastern Siberia close to the border with China and 300,000 Russian troops have been involved in the week-long exercise together with joint exercises alongside Chinese military counterparts.
He said that 87 observers from 57 countries have been invited to watch the drills.