He had something on his right wrist that he contiually was adjusting. It looked like a string or rope, but I have no idea what the thing you are referring to looks like.
Its something in honor of his girlfriend who wears the same exact thing. I guess is a token of ones love for another that they wear. I wonder is he'd be wearing that when he visits the infamous strip club in Orlando ( the one where Ewing visits frequently ).
You see a love band and I see what is clearly a foul! NBA players may not use their hands or arms to redirect another player! Yao is clearly being redirected towards the baseline by someones fore arm to his ribs.