Tienanmen definitives

 File:PRC Gate 1.jpg|thumb|center|250px|From the 1950 first definitive issue. File:PRC gate 5th.jpg|From the 5th issue, with network underprint.  The Tienanmen (Gate of Heavenly Peace) definitives were 6 issues that were the first regular issues for the People's Republic of China. Some are distinctive due to color and value, but some are not. Here's how to tell the issues apart:

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