The Medicine Knight Who Took Out a Loan to Cultivate Immortality

Once he made a mistake, Lu Zheng traveled through the modern world of immortality. In ten years, he finally became a monk and a knight. It's just that he discovered... It seems that his path to immortality has been borrowing money. It seems that his own way of knighthood has been taking medicine. "Then let me ask you, if I borrowed money for Qi training, I don't have to pay it back for foundation building?" "Then let me ask you, after my body is sanctified and I don't take any medicine, is it purely a natural exercise?" (The entire process is coded using ancient methods)