Khói Trắng

Mai Ngọc Căn

Bao, worker

Hoa Van

Duoc, foreman

Mạnh Linh

Quyet, party secretary

Kim Thanh

May, controller

Lân Bích

Hoa, worker

Minh Đức

Bien, laboratory assistant

Anh Thái

Thanh, union member

Tiem Ton

Xuan, union's director

Minh Trâm

Mrs. Duong, Bao's mother

Sỹ Minh

Deputy technical director

Đức Hoàn

Voong's wife

Mai Châu

Quyet's wife

Tự Huy

Factory's clerk

Minh Tân

Technical worker