One last time, let's discuss his wife death. Plz.

And I really just want to concentrate on the wife's death case here please. I prefer to think that indeed she was alive and we see her, after the credit, getting off the train. That would mean that the ashes in the box we're not his wife. Cool right? Yeah. But then, all of my confusion comes from the confession the restaurant guy made on TV about killing the woman he recognize as the wife. The only argument I found against that is that he mistakes her with another woman who looks alike and who had a picture of a daughter who also looked alike. Look-alike so much that even the father would confuse her with his daughter. Way too far fetch. I really want to believe that the wife is still alive but the only good argument I found is about her being dead, here it is:

. She is dead. The woman at the restaurant recognizes the picture and says she was good friends with the Japanese restauranteur. The Japanese restauranteur recognizes the picture and gives the main character her address. He goes to the address and finds a picture of their child in the apartment. There are signs of a struggle and blood stains on the walls. Later, the news mentions that a woman from the same region in China as the main character is found dead. Later, the news states that the Japanese restauranteur admits to the crime, stating that he killed her because she planned to return to her husband in China. The final scene is just a cheap gimmick - a flashback or fantasy sequence. If it is meant to truly show that she was alive all this time and returned to China, then the previous events must be a fantasy: why would a stranger have a picture of the main character and her child in their apartment?

So please can anyone give me a convincing argument to confirm my thoughts on her being still alive and that we see her getting off the train in the end. Thank you.