You also need to know Russia, India and the U.S. are planning excercises together too.
Russia and China are more likely to be enemies than allies. China covets what it considers ancestral territories in Russia's southeast. Russia lacks the military manpower to guard its territory. Putin could be showing China his long-range technological muscle.
The age-old dance of major powers sizing each other up and carving out spheres of influence and alliances is underway on a global scale. The dance cards are filling up and I think Russia, India and Japan know who to waltz with. The Chinese can't be trusted.