Thank you for looking. These were purchased at the local post office and were part of my personal collection, but I am currently organizing and listing them sequentially. As they have been stored at home for a long time, please check the photos for any dirt, stains, or fingerprints on the stamps. Please refer to the images for the condition and consider purchasing if you understand. The stamps will be sent by regular mail, wrapped in cardboard and a plastic bag. A set of Chinese stamps with the theme of environmental protection. - Theme: Environmental Protection - Country of Issue: China - Design: Umbrella and solar panels - Design: Wind power generation and animals