Innovation in Science and Technology (IV) (Maximum Cards) (Set of 5)
The cardboard cover for this set of five maximum cards appears in the top right of our scan, along with most of three of those five cards. It’s China National Philatelic set MC-138 from 2023, and the cards show experimental rice, the Mars Rover, a cosmic ray observatory, a satellite, and … artificial starch. Definitely an outer-space theme. Grade: 1