7. The chatting system according to claim 1 , further comprising: a communication platform between the pet client device and the virtual pet server device; wherein the communication platform forwards the natural language sentence and the natural language response between the pet client device and the virtual pet server device.
8. The chatting system according to claim 7 , wherein the communication platform is an Instant Messaging, IM, communication platform, a short messaging service communication platform, a network interface communication platform, or an Email communication platform.