He Ain't Heavy, He's My Father aka. He Ain't Heavy, He's My Brother (新難兄難弟) is a 1993 Hong Kong film directed by Peter Chan. The title is a pun of "He Ain't Heavy, He's My Brother" , a hit single for The Hollies in 1969 and for Neil Diamond in 1970.
Yuan scorns his father, who he thinks is too generous and forgiving. Through a flashback/time travel gimmick, Yuan meets his parents during their joyous courtship. Yuan comes to understand and admire his dad, and reflect on his own moral defects.
There was a 2009 TVB Adaption of the movie taking place in 2008 and then the 1960s.The father of the main character is played by Sunny Chan while the main character is played by Ron Ng.
(This is information generated from a Wikipedia article, licensed under the GNU Free Documentation License.)