A Russian Blue cat may meow continuously possibly because it has left its original environment, original mother cat, and original companions. You need to spend more time with it and talk to it. Although it may not understand, this can help stabilize its mood. If these methods do not work and it continues to meow after staying in your home for two to three days, you should consider whether it is sick.

　　Additionally, if it lacks a stable home, or is hungry or cold, these conditions may also cause the Russian Blue cat to meow continuously. Observe it for a while, and if necessary, take it to see a vet. If the meowing is caused by illness, it can be dangerous to the kitten's life.