[Chinese]MOND-018 The aunt who was made into a doll for display

A young man who had been beaten by his grandfather since childhood received a letter. The sender was the young man's aunt, the daughter of his grandfather's mistress, and they were close in age, so he called her 'sister.' The content was that his grandfather had passed away and he should return home. The young man, having made up his mind, witnessed an unbelievable scene upon returning to his hometown… What was the truth that the young man witnessed?