The Number One Garbage King in the World of Immortality

[System prompt: High-value waste detected! Su Chen looked at the mountain of garbage in front of him and smiled like an idiot. The outer eldest brother mocked: "A handyman who rolls around in the garbage every day is really a waste among wastes." Three months later - "Senior Brother Su! Do you still want that pile of waste elixir? If not, please keep it for me!" The chief of the inner sect sneered: "Are you worthy of fighting with me?" Half a year later - "Senior Su, please spare your life! You can take those broken magic weapons! Please accept them!" Su Chen: I really just want to pick up trash quietly... Why did I become an immortal?