I Can Travel Through the Apocalypse

What should Zhang Yuan do after traveling to the realm of chaos? Although he is still in his own home, although he still has the same face as him, and although it is still his own community, why is there no living person in the community except himself? There were walking corpses all over the ground, and there was still a lot of food in the house. But what did Zhang Yuan see when he came to the gate of the community? A huge valley, surrounded by towering cliffs. Where is this realm of chaos? Oh? Jump out of a system panel! Oh? You can choose your career to upgrade! Oh? There is also a gift package for newbies! Oh? You can also gain experience and equipment by killing zombies, and you can also upgrade and learn skills. But! If you are alone, why can't you give yourself a companion? "Hey! Congratulations to the host for reaching level 10 and opening the lord system, choosing a territory to summon companions to strengthen himself; brave young man! Your journey is the entire realm of chaos."