Say goodbye to Vancouver. What is the ending of Ren Xiaoxue?

Mental disorder. According to the brief message of "Farewell to Vancouver", Ren Xiaoxue was reported by Yu Shixiong in Vancouver because she didn't have an immigration card and was later sent back to China. Yu Shixiong took her home and found that she was pregnant, so she spilled oil on the stairs, which led to Ren Xiaoxue's miscarriage and mental disorder.