600 miles, 71 days and a 72 year old man

I just read a very moving story in the news about a 72 year old Chinese man who walked more than 600 miles to visit his son in prison. The journey took him 71 days and he had to walk with a stick. He had all his savings stolen just after he left home, so had to beg all the way and was sometimes forced to eat rotten food from bins. When he arrived the prison staff bent the rules to allow him to see his son which he hadn't seen for 2 years. Apparently his son was actually adopted and said "He adopted me and loves me very much, but i have nothing to repay all this"