Best Answer - Chosen by the Asker
This is dialect from some places in northern China, like Henan/Shangdong/Shanxi province.
“这件事情中不中” , this kind of sentence sometimes will be used in rural novels .
CASE:
A: 这件事情中不中？ is this OK?
B：中！OK, of course.
TIPS:
being aware of it is enough, you do not have to use it in daily life as it is not a formal use.
