There are 12 “First Day Covers” issued by China Post using postage meter imprint instead of stamps, and each with an actual postmark for the same day as the meter.   But even though this is a sequence of 12 covers issued in 2018, the dates on each are different and run into 2019 also.  On the back of each envelope, there’s Chinese text and a serial number.  Those serial numbers are not the same for each envelope, and they’re not sequential either.

Now, imagine that each FDC has a corresponding postcard with the same meter and postmark date as its envelope.  The serial number on the card does not match that on the FDC.  The reverse of the postcard has a graphic the same as its FDC, and with more (Chinese) text.

So all in all there are 24 pieces:  12 FDCs and 12 postcards.  In some ways they match, but in others they don’t.  No, we don’t understand this either.   Unused (of course) and Grades: 1