Re: PLAAF Photos!!
I'm not even sure if USAF thunderbirds will switch to F-35 eventually given its controversial maneuvering and that you don't need super expensive stealth fighters for a good show. Unless there was political motivations of course.
The USAF has stated they intend too retire the Whole Falcon Fleet too be replaced with F35A's Although In the past the Thunderbird's did for a short time fly Trainers I very much doubt you will ever see that again A more likely out come will be Thunderbird's flying Lightnings.
The Question of the J10 vs J10B depends on the pattern the PLAAF establishes for there Demonstration teams. US demonstrators use fighters that have been pulled form the front lines and then given a rebuild this means that the FA18 of F16 flown in your local air show are not brand new but rather combat vets. they tend too get there new fighters near the end of that versions life cycle. Not the top of the line.
If the PLAAF Fallowed this pattern then don't expect J10B's anytime soon not until they start putting the J10 out too pasture. If they established some other pattern then well who knows.