Fantasy: Invincible at the Start? Why Didn't I Know!

[Fantasy + Shuangwen + Dihua + Invincible + System] Lin Xuan traveled to the extremely terrifying world of practice. I thought I was a mortal, so I had no choice but to live in Qingshan Town, open a small teahouse, and live a quiet life. Until a beautiful girl walked into the small teahouse, Lin Xuan discovered that the mind of a cultivator who seeks immortality is very strange~ The Saint and the Demon King longed to be by Lin Xuan's side forever, serving him tea and water, and she was happy to be a little maid! "Senior! Please give me a cup of tea!" The peerless genius knelt down and shouted. "Senior's painting contains the secrets of the supreme avenue!" The thousand-year-old ancestor marveled. "Imperial weapon, this is the imperial weapon!" A group of experts scrambled for a woodchopping knife. Lin Xuan: "Well, when will I become invincible?"