It's Been 3 Billion Years, Has My Home Planet Contacted Me?

[Travel + Different World + Immortality + Invincibility + Urban Cultivation + Micro Science Fiction] As soon as he woke up and traveled to an alien planet, Lin Chen couldn't help but had no choice but to live in silence. Who would have thought that this dog would be 3 billion years old! He was once impoverished, but with his unique abilities, he became a being above all others. He thought he had suffered all the hardships, but unexpectedly learned that he only had one chance in this life. If he failed to complete the task, he would be annihilated along with the world. But he didn't even know what the mission was. He made a lot of efforts and finally found the cornerstone of memory under the guidance. But he didn't expect that this was just the beginning. After he returned, the disaster would officially come.