Please click below to read the full BBC report on the Lai Dai Hans situation and Memorial by Ly Truong.
This story is part of the Crossing Divides season, bringing people together in a fragmented world
Author: Ly Truong
Illustration: Jilla Dastmalchi
Researcher: Hyung Eun Kim
Images: Derrick Evans, Getty Images, Alamy
Online Producer: James Percy
Editor: Sarah Buckley