My dad died, and I asked the monk to teach him how to do it. Will he know?

will know. It is more in line with Chinese culture to ask Taoist priests to fill the library to repay their kindness than to ask monks to do land and water dharma meetings and other over-the-top dharma meetings. Monk Sanzang came back from the scriptures to do the merits of the land and water dharma association, not to fill the library to repay the merits. The merit of a fake monk in filling the library is imitation and invalid. Because the fake monk imitates the merit of filling the library, it is the fake sutra Shousheng Sutra published by Buddhism. Based on the apocrypha, the ritual is invalid.