| Stamp SN | D321 |
| Stamp Name | Special 321 Environmental Protection Postage Stamps (Issue of 1993) |
| Stamp Cat Standard | Special Stamps |
| Stamp Cat | Environmental Protection |
| Issue date | 1993-06-05 |
| Suspersion date | |
| Dimension of stamps(mm.) | |
| Size of souvenir Sheet (mm.) | |
| Printer | China Color Printing Co. Inc., R.O.C. |
| Drawer | |
| Designer | |
| Photographer | |
| Engraver | |
| Creative Director | |
| Sheet composition | 5×6 or 6×5 |
| Print color | |
| Process | Deep etch offset |
| Paper | Locally-made mat finished, watermarked stamp paper with gum |
| Back | |
| Perforation | 12 1/2x13 1/2或13 1/2x12 1/2 |
In order to promote better understanding of environmental protection and also to establish the consensus of environmental conservation being the responsibility of every citizen, this Directorate released a set of Environmental Protection Postage Stamps. The designs of the two stamps were adapted from Yen Chao-min's〝No More Noise Suppression〞and Hu Hui-chun's 〝Clothing My Hometown with Green〞which were the two best paintings selected from the National Competition of Primary & Middle Schools for the Designs of the Environmental Protection Stamps jointly held by the Environmental Protection Administration, Executive Yuan and this Directorate.