"Great... ah, great civilization, having discovered your arrival, we did everything we could to find you so that we could greet you and speak with you. Perhaps you do not know this, but Deep Blue Star has never encountered an alien civilization throughout its development. Your arrival has shown us that we are not alone in the universe, and we are deeply grateful.
Of course, we also wish to know why you came to Deep Blue Star, where you came from, whether other civilizations exist in the universe... Oh, and everything in the depths of the universe. We are all very curious.
In the past, we could only observe from afar through telescopes. Now that we have such an opportunity, we do not wish to let it pass. If it is not too much trouble, could you tell us something about the universe?"
When they wanted to address humanity, the Deep Blue Star People realized that they did not even know what to call this alien civilization.
After a brief pause, they simply addressed it as a great civilization.
As for the method of communication, the Deep Blue Star People did not send the command to the probe and have it relay the message. Instead, they encoded it directly in the Command Center, then used the Ground Radar Antenna Array to transmit Electromagnetic Waves into space.
The Deep Blue Star People believed that this great civilization would receive the message, because they were convinced that it had mastered Quantum Entanglement Hyperdistance Communication.
Their preconceived notions played a trick on the Deep Blue Star People. Especially after their message received a response almost instantly, they became even more certain that the aliens possessed Quantum Entanglement Hyperdistance Communication.
"Just call us the Star Alliance. Our full name is the Star Voyage Alliance."