Sixteen years, your yang life is only sixteen years. These were the words that Luoyang's prophecy master Jia Ye gave him when he saw Lin Fei for the first time. This year, Lin Fei was sixteen years old. A new and mysterious world opened up to Lin Fei. This is an oriental fantasy genre that describes the growth experience of a teenager. If you insist on writing a brief introduction to the content of this book, it is better to write a book that wants to express something, so as to understand it. This is the struggle and rebellion against fate. Knowing the north, everything in the universe originates from qi, and Taoism is everywhere. The northern, Xuanya, means an unknowable place.