Ngày Và ĐêmDay And Night (2004)

Day and Night tells the story of a miner, Li Guangsheng (Liu Lei), in a fictional northern Chinese city who carries on an illicit affair with the wife of his friend and father figure (played by Orphan's Sun Guilin). When his friend is killed in a cave-in, the miner is wracked with guilt and takes it upon himself to end the affair, rebuild the mine, and help his friend's mentally disabled son find a wife.