China
| Country: | China |
| Type: | Postage stamps |
| Series: | National Conference of Sciences |
| Nominal: | 8 分 |
| Year: | 1978 |
| Perforation: | comb 11¼ x 11 |
National Conference of Sciences
 National Conference of Sciences |  National Conference of Sciences 1.1$ |  National Conference of Sciences 1.1$ |