Technical Details:

Serial number: R.31
Values in set: 2
Denomination: 11.00 yuan
Date of issue: 1st January 2004
Designer: Huang Huaqiang
Size of stamps: 27 * 38 mm
Perforation: 13.5 * 13
Sheet composition: 30
Printing process: Photogravure
Printer: Beijing Postage Stamp Printing House

Yellow-bellied Tit 5y
Yunnan Nuthatch 6y