GPT and ovarian cancer: To further evaluate the therapeutic effects of the cryopreserved MSLN CAR‐iNK cells on tumour cells in vivo, we established a human ovarian cancer xenograft animal model by transplanting the luciferase‐expressing A1847 (A1847‐luc+) cells (2 × 105 cells/mouse) into NCG (NOD/ShiLtJGpt‐Prkdcem26Cd52Il2rgem26Cd22/Gpt) mice on day −1.