There is a Taoist priest in the ghost film who calls it a secret burial once every 30 years.

Yuan Biao plays Feng Shui master Jiang Tianji in Shi Tian vs Zombies 20 14. His grandfather and father helped a rich man choose a nine-yin cave for money, which can suck up all the wealth of others, but after 30 years, he will move his grave or his health will change, and his luck will become extremely bad.