advice for china: don't make anyone believe you have something of value. I just came from a friend's funeral 2 weeks ago.
He's a businessman out of USA, was coming to see me for some investment properties. As he was walking down downtown shenzhen, after visiting me in guangzhou, he was talking on his $500+USD cell phone. Someone came up behind him and slashed his throat, took his cell phone and wallet. Point being: don't flash anything...cell phones, money, jewelry, armani suits etc... China is a great country, but it's like any country out there, there are good and bad people. Unfortunately, a lot of people are turning to crime due to desperate situations.
Like I said, play it safe, just as you were going to eastern europe or any other country.