Mortal Cultivation: Selling Myself to a Thousand-Year-Old Snake Demon

[Mortal Flow + No System] Shi Zhen, who has ordinary qualifications, has no other strengths except that he can eat.

At the beginning, he was forced to sell himself to a mysterious woman to save his sister. As a result, he started a magnificent journey of cultivating immortals.

(This book focuses on elixirs and furnaces, with many female protagonists. I guarantee that it will be completed in 10 million words. This site has completed the mortal flow immortal heroes "Transcendence into Saint", "Evil Cultivation into Saint", and the urban immortal "One Billion Years of Immortality". Welcome to read)