Cultivation, I Admit It

The time traveler Lin Feng traveled through time and became Dan Yangzi, a handyman disciple who was dying. The body collapses and no one cares. At a critical moment, he found a book of exercises written in simplified Chinese characters in the corner of the Tibetan Gong Pavilion - "Three Years of Death, Five Years of Death". The first and last pages of the exercise are written in Chinese characters respectively: "A colleague who can't go back." "Go and find my secret (treasure), I left him in xxx!!" Lin Feng patted the dust on the technique caused by no one studying it for many years, and said, this senior is really good at playing tricks. I really don't know what to use for the name, so I can only make do with this first.