This movie is also called "Dust of life" in English and was made by Alex Bouchareb in 1994.
In 1975, 3 kids decide to escape a reeducation camp in the Vietnamese equatorial forest near Cambodia where the Amerasians are imprisoned, tortured both mentally and physically. Son, the hero is sent in that camp after her mother fails to find his father to send him away to America.
Search the web for the title to find more information. You can find the poster of the movie on cineposters dot com.
Kind of reminds me of Papillon or the Killing Fields though maybe a notch down in terms of realization... This movie is based on facts from the after war.
2018年是Sing Like Talking出道30年,他們的音樂以及粉絲所寫的信是這部電影的故事來源,2016年8月6日在東京日比谷的野外大音樂堂裡舉辦Sing Like Talking Premium Life第二彈,電影收錄了這次演唱會的片段花絮以及粉絲團所募集的真實故事,將兩者化為劇情合為一部音樂電影作品