Is the fortune-telling of Daimiao Temple in Taishan accurate?

Of course.

Dai Temple at the foot of Mount Tai worships Dongyue the Great, also known as Mount Tai God, who can seek family harmony, good health, wealth, marriage and further study. So you can continue your studies.

According to the "Three Religions Tracing the Source", the Emperor Dongyue was the son of Wang Shaohai, a Miao-born golden wheel of Pangu IX, and his wife Mi Run Fairy, whose first name was Jin Hong. Jin Hong's exploits were in Changbai Mountain, and when he arrived in Fuxi Shi, he was named Tai Sui.