Taboo of Paper-Tying

My grandpa's family was a paper maker. When someone died, he made some houses, cars, cows, horses, and sedan chairs. In short, it was an industry that dealt with trivial matters. However, one summer vacation when I was a child, I encountered a strange thing at my grandpa's house. I saw some things I shouldn't have seen, and even saw that weird girl who had been pestering me all my life. From then on, I didn't dare to go to my grandpa's house again. But I never thought that one day I would have to come back and inherit this weird industry, because if I don't go for three years, I will die.