What was thebig surprise at the end of suyuan woo's story in kweilin?

At the end of Suyuan Woo's story in Kweilin, the big surprise is the revelation of her long-lost twin daughters, whom she was forced to leave behind during the war. After years of hardship and sacrifice, Suyuan's hope and determination to reunite with them ultimately come to fruition when she learns they are alive and living in America. This emotional twist highlights themes of resilience, hope, and the enduring bond of family despite the passage of time and distance.