Receiver xbee receiving data while the Transmitter is powered off?
As @Garben mentioned, we do not know what is your question, problem or whatever...
Provide some more information about wiring. I looked at your question 5 mins and still can't get what is wrong...

What are you doing here??? Sending from Arduino+XBEE to another Arduino+XBEE???

void loop() {
    Serial.println("Hello");
    delay(1000);
}


Here you are resending what you got

void loop() {
     if(Serial.available()&gt;0){
         Serial.print((char)Serial.read());
     }
} 


So what is your problem? Or is this all your code???
Arduino has to have 

void setup(){
//Set up your Arduino here
}
void loop(){
//Code here will run over and over and over...
}