Here is another block of chinese tian an men stamps with missing perforation holes in the middle and the right side.Unfortunely,I am not sure if this block of stamp is genuine or not because there are many chinese fake stamps circulating in the market nowadays.Beside that,I have never seen anything like this before and really have no idea how could this happened on this stamps.By the way,I bought this stamps from someone else many years ago.So,I need help from the experts to identify if this block of stamps are genuine or not and tell me about the missing perforations in the middle and on the right side.Another thing is the missing perforations common or rare thing happened on any other country stamp?
Hopefully someone or the expert is able to answer my questions above and help me.Please refer to the scans below and let me know what you think of it.
Anyway,I will get back to you as soon as possible after your reply over here.Thank you.

