I Just Know How to Teach, I'm Really Not an Immortal

In this world where demons are resurrected, in the age of Dharma-ending, Taoism has been lost. In order to resist evil spirits, people use the ability of exorcists to Zhang Xiaolou, who was imprisoned in a detention center, accidentally awakened the Tianshi System. You can get heaven-defying rewards by killing evil spirits, promoting Taoism, divination and fortune telling, meditating and breathing, etc. [You obtain the art of physiognomy (perfection)] [You obtain the Golden Light Spell (Perfection)] [You gain a hundred years of cultivation] Zhang Xiaolou: I just know how to teach Taoism, I am really not an immortal!