Stamp Title: National Scientific and Technological Exhibition of Juniors' Works Scott No: 1511 Serial number: J40 Values in set: 1…
Stamp Title: Study Science from Childhood Serial number: T41, T41m Values in set: 6 (6-1), Aeromodelling, 8 fen, 26*31 mm…
Stamp Title: 30th anniv. of Founding of PRC (5th Set) Serial number: J48 Values in set: 4 (4-1), The modernization…
Stamp Title：30th anniv. of Founding of PRC (4th Set) Serial number: J47 Values in set: 4 Date of issue: October…
Stamp Title: 30th anniv. of Founding of PRC (3rd Set) Serial number: J46 Values in set: 1 Date of issue:…