Once you get him back, you should neuter Choy Choy because he may run away again if he "smell" bitches on heat. Most male dogs will run away because they follow bitches on heat. And they may get into fights with other male dogs.
I have check DBKL in Ayer Panas and PAWS today but no sign of him. I assume someone have keep him. If people likes him and keep him, I'm fine with that. As long as he is in good care.
He came back yesterday and been attacked by two other street dog around our house. His leg have minor injured. However he still doing fine. We are glad he came home.