According to the search results, Suyin, played by Li Bingbing, died after the events of The Meg, and her absence is explained in Meg 2: The Trench. The exact cause of her death is not revealed, and the details of what happened in the years between the two movies are not provided. The absence of Li Bingbings character is explained within the movie, but the details of her death and what happened in the years between films are not provided. The movie only hints at the mystery of her death with a fleeting scene where Jonas Taylor and Meiying discuss her absence. It is unclear why Suyins character was killed off-screen, as it limits the possibility of Li Bingbing returning for future sequels.