After Foreseeing the Apocalyptic Future, I Put Down My Pen

My name is Zhan Xinghe, and I am a scientific researcher. I just want to live a peaceful life with my pen. However, there is a white-headed lion who always reminds me that I need to become stronger... ………… The unknown doomsday destroyed the previous civilization, and the world has been drastically changed due to the disaster. There are more alien beasts in the world, more strange areas in the world, and more mysterious shelters in the world. People speculate that the shelter is the harbor that the former civilization left for the post-apocalyptic humans. No alien beasts will come near here, and it is very safe.