[1]: 1–3 In the 1980s it was found that the Yao clearly identified with the Chinese-language Taoist theological literature, seen as a prestigious statute of culture (文化 wénhuà).
[2]: 48–49 The tsow say ong are high priests who perform rites for the higher gods of the pantheon ("above the sky") and officiate funerals.
The Sai nzung sou is the book of ceremonies for inviting the mienv zoux ziouv, good spirits who protect the location.
Then the priest perform a water ritual, the zoux sin, for purifying the person's dead body from evil spirits.
Subsequently, the priest performs the doh dangh caeqv jaiv, a ceremony to purify the soul of the dead person from the influence of evil spirits.