Are this Genuine or Forgery cover.?
Genuine means really send.
Forgery means just making forged rubber stamps of chinese post office and apply to forged stamps?
Following is screenshot from eBay with Chinese stamps cover, which include stamps of Mao, Mao Poem and lot of others.
Think twice before you buy any CHINESE stamps because there are lot of replica available.
I think only replica is available in market.!!