Riding Alone For Thousands of Miles (2005)

Both Chinese movies involved walking for thousand miles, difficult journey for a mission or for a calling. Human physical suffering. Many sweet and bitterness

Both films are about Japanese going to remote villages in China. In Birds People in China, the ML, a young Japanese salary man goes to evaluate precious Jade mines.

Both about father and son
Both are Chinese movie
Both movies the father travel long distance to find the son

Both are about long distance walking or running.
Although one is older and more serious, the other one is funny
Both take strong mind set to complete

Both movies about parent and child.
Both are Chinese movie that protract parenting love
It appeared to be a long ride the reunited them
They went through hardship