I'm not entirely sure as I haven't read the Marial World light novel in full. But usually, there is a protagonist who drives the story forward. Maybe it's a young hero with some special abilities or a great destiny.
One of the main themes could be adventure. The characters often embark on various quests and journeys in different parts of the Marial World. Another theme might be friendship. As they face challenges together, the characters form strong bonds. And also magic, which is likely a central element in the story, with different characters having unique magical abilities.
Son, grandson, great-grandson, and great-great-grandson were the titles of the family hierarchy. The following conclusions:
1. Children: refers to one's own children, the second generation of descendants.
2. Grandson: refers to the son of a son, or one's own grandson, which is the third generation of descendants.
3. [Great-grandson: In folk language, great-grandson and great-grandson have the same meaning. They refer to the son of one's grandson, which is the fourth generation of descendants.]
4. Great-grandson: refers to the grandson of a son, or one's own great-grandson, which is the third generation of descendants.
5. [Great-great-grandson: refers to the son of a great-grandson, or the grandson of one's own grandson, which is the fourth generation of descendants.]
According to the folk saying, great-grandson and great-grandson could be used interchanged, but in the official hierarchy, great-grandson was greater than great-great-grandson. The order of seniority was generally considered to be children> grandchildren> great-grandchildren> great-great-grandchildren. However, it was important to note that these names might differ in different regions or families.
To sum up, children, grandchildren, great-grandchildren, great-grandchildren, and great-grandchildren were different terms of address for the family hierarchy, used to express different descendants.
The cast list of Big River included Wang Kai, Yang Shuo, Dong Zijian, Yang Caiyu, and other leading actors. Wang Kai played Song Yunhui, Yang Shuo played Lei Dongbao, Dong Zijian played Yang Xun, and Yang Caiyu played Liang Sishen. Other actors included Tong Yao, Yang Lixin, and others. These actors played an important role in the TV series.
Great-grandfather, great-grandfather, and great-grandfather were the Chinese names for family members. According to the information provided, his great-grandfather was the third generation, and his great-grandfather was the fourth generation. However, there was no clear explanation regarding the Mystic Ancestor in the information provided. Thus, it was impossible to determine the seniority of the Mystic Ancestor.