✔ 最佳答案
I have a friend who tried to do so before.
His case was the same with you --- 回鄉證過左期.
But because we are HKG Chinese, we are supposed to have 回鄉證,
and when my friend show his BNO to the 中國關員,
the 中國關員 asked him many many many questions,
both with sense and non-sense questions.
for a conclusion, that 中國關員 is only 玩下你,
only because you are a HKG Chinese, and using BNO to 扮鬼佬
p.s.
this happened many years before,
I do not know the situation and rule are changed or not.