In the movie "Meg 2: The Trench," Meiyings mom, Suyin, is not present because she died between the events of the first movie and the sequel. The specific reason for her death is not provided in the movie, but it is confirmed during a celebration hosted by Juiming for the Oceanic Institutes 10th anniversary, which Jonas and Meiying attend. Suyins brother, Jiuming Zhang, is introduced in the sequel and takes on a significant role in the story.