In the birth chart, the element in the upper Day column represents you. It's called Day Master in Chinese astrology.
When Five Stars apply on Chinese Astrology, we need more detail by breaking down into Yin Yang (Female and Male) for the Companion, Child, Money, Career, and Parent Stars. These 10 different combinations are called Ten Gods in the Chinese astrology.
Based on the the Affinity, Enmity and Attraction of Stem Relationships with Day Master, each Male or Female Star can infer to something or somebody. For example, a person's Day Master (you) is Male-Wood .
Mother, Guardian, Friend, Contender, Artist, Actor, Windfall, Property, Evil and Angel Stars are called Ten Gods.
In Chinese astrology, the Parent (Guardian and Mother), Artist, Actor, Money (Property and Windfall), Evil and Angel Stars are called Six Gods.
When Male Wood is boy, then
Male Wood is his brother, because you have same gender.
Female Wood is his sister, because you have different gender.
Female Earth is his wife, because Male Wood and Female Earth have attraction relationship.
Female Water is his mother, because Water is the Mother element of Wood.
Male Earth is his father, because Female Water and Male Earth have attraction relationship.
Female Fire is his grandma, because Female Fire is the Mother Element of his father, Male Earth.
Male Water is his grandpa, because Male Water and Female Fire (grandma) have attraction relationship.
Male Metal is his son, because Male Metal is the Child element of his wife, Female Earth.
Male Metal is his son, because Male Metal challenges Male Wood, himself.
Female Metal is his daughter, because Female Metal has same gender with her mother, Female Earth.
Male Fire is his father-in-law, because Male Fire is the father of Female Earth, his wife.
When Male Wood is girl, then
Male Wood is her sister, because you have same gender.
Female Wood is her brother, because you have different gender.
Female Metal is her husband, because Metal can overcome Wood.
Male Metal is her boy-friends, because Male Metal has same gender with Male Wood.
Male Water is her mother, because Water is the Mother element of Wood.
Male Earth is her mother-in-law, because Male Earth is the Mother element of Female Metal, her husband.
Male Fire is her daughter, because Male Wood is the Mother Element of Male Fire.
Female Fire is her son, because Female Fire has different gender with her daughter.
Female Fire is her son, because Female Fire challenges Female Metal, her husband.
Female Earth is her father, because Female Earth overcomes Male Water, her mother.
Female Water is her grandpa, because her husband (Female Earth) challenges Female Water.