Is grandma grandpa's grandma or grandpa's grandma?

Grandmother Zu is my grandfather's grandmother. Now some appellations are often not used, so I probably forgot:

First of all, paternal elders:

Grandfather-grandfather's grandfather, that is, great-grandfather;

Grandmother-grandfather's grandmother, that is, high grandmother;

Great-grandfather-father's grandfather, that is, great-grandfather;

Grandmother-father's grandmother, that is, great-grandmother;

Second, the matriarchal elders:

Grandfather-grandfather's grandfather;

Grandmother.-Grandfather's grandmother.

Grandfather-grandfather's father;

Grandmother-grandfather's mother;

Second, you may or may not know the following terms.

1, parent:

Aunt-grandfather's sister or younger sister, father's aunt;

Grandmother's husband;

Aunt's sister-grandma's sister, father's menstruation;

Aunt grandpa, my aunt's husband, is not related to you;

Granduncle-grandmother's brother or younger brother, father's uncle;

Uncle grandma-uncle grandpa's wife, and you are not related by blood;

Uncle-my father's cousin;

Aunt cousin, uncle cousin's wife, and you are not related by blood;

Cousin-father's cousin;

Cousin's wife is not related to you;

Cousin-father's cousin or cousin.

2. Maternity:

Grandmother-mother's aunt, grandfather's sister or younger sister;

Grandparents-grandma's husband is not related to you;

Menstruation-mother's menstruation, grandma's sister or younger sister.

Uncle-aunt's husband, and you have no blood relationship;

Uncle-mother's uncle, grandmother's brother or younger brother;

Great-uncle's wife, not related to you;

Cousin-mother's cousin or cousin;

Cousin, cousin's wife, is not related to you by blood;

Table menstruation-mother's cousin or cousin;

Cousin's menstruating husband is not related to you.

How's it going? Are you dizzy?