Explain

Guo Ziling, who grew up in Zhengdao, was deeply loved by his master. But he didn't understand: Why has the master always refused to teach him Taoism? For seventeen years, every time the senior brothers and sisters practice, the master tells Guo Ziling to go back to his room to do his homework. ... The master was finally willing to teach him the Taoism. From then on, he was determined to use the Taoism taught by the master to eradicate all evil ways in the world. But he doesn't know that a huge mystery is waiting for him. The master's original guess might have been right. It might have been better if the master had made up his mind and never taught him the Taoism. A fact that he cannot accept will be revealed step by step by him. The truth is so cruel... How will he choose?