Well, there is still a possibility he can get little taller. Is this a good or bad thing if he does get taller?
Hidayet Turkoglu grew from 6'10" to 7'0" last year since he's been with the Kings. Two years for two inches. And he's just 23/24. Not sure about Yao. All people are different. But it could happen. I think it would make Yao more awkward, though.
It wouldn't really be a good thing for Yao to grow taller. For one thing, that means less muscle mass. Also, that will limit his so-so athleticism even more. Getting growth spurts isn't really all that beneficial, even in basketball, because you must get used to your "new" body. Yao has enough to adapt to, much less a still growing body. Yao is tall enough as is.
LOL......I often grow..............sideways...........4 inches in last 8 years!!... Seriously, I think Yao is tall enough. He needs to get stronger. That's it.