What is the relationship between Grandpa Taishan and Grandma Taishan?

The relationship between grandpa Taishan and grandma Taishan. Grandpa Taishan and grandma Taishan are both legendary immortals. Grandpa Taishan is regarded as the God of Mount Tai, who is in charge of the geomantic omen and culture of Mount Tai. Grandma Taishan is regarded as the patron saint of Tai 'an and Mount Tai, and as a model for women, who can bless family happiness and good health. Their relationship is the relationship between immortals, which is different from the family relationship of ordinary people.