Who Is the Woman in the Screensaver?

Who Is the Woman in the Screensaver? Plot:

Programmer Lin Chuan has been haunted by his computer screensaver lately—his original landscape wallpaper keeps switching to Su Wan, a woman in a Republic of China-era cheongsam. Even scarier: Su Wan can talk through the screen, claiming she was a 1937 Shanghai actress trapped in an old photo by a fire. When Lin Chuan helps her find the truth, he discovers a photo of Su Wan in his late grandmother’s album. Strangely, the longer Su Wan “stays” on the screen, the more Republic of China-era items appear: an old fountain pen on his desk, a flower vendor’s cry at the alley, even a 1937 text on his phone. When he finds Su Wan’s original negative, he’s shocked—the woman in it looks 70% like him, and the fire date Su Wan mentioned is exactly his grandmother’s birthday… Is this a cross-time obsession, or a past-life bond in his blood?