I read the full article ... honestly I don't think JH-7B will be produced, it simply obsolete and JH-7A is just fine. With the introduction J-16, the PLAN version will be available soon .. so no point to produce JH-7B.
The article does say it is a prototype and may not going into production
For contacting purposes, I think you should ask Huitong to contact on your behalf because he's well-known amongst weibo PLAAF-watchers. If all else fails, I can try contacting for you but I definitely recommend asking Huitong first.