If this is true (It is a Debka File report) then the ChiComs are in the South and the Russkies are in the North, securing the coast.
Reports which are generally true (unless it concerns Palestinian/Israeli machinations or internal Israel politics) just as any other outlet stories are generally true, with exceptions.
Both parties are based at Tartus, and, from the sound of it, will be working together first in Syria and then Iraq. They aren’t securing the coast so much as eliminating a major threat to their country’s security.
None of this would have happened had Obama not withdrawn US forces.