Cosmic Age 1 Unknown Journey

In the late 21st century, human science and technology exploded. After gaining certain space combat capabilities, they continued to send a large amount of information to the universe. They were eventually discovered by two alien civilizations. They began to send a large amount of technology and civilization to humans in a friendly manner. However, their conspiracy was gradually revealed, and eventually one of them was swallowed up by the other. Finally, mankind had to start a centuries-long confrontation with alien civilization.