• In 1988 China Post issued the definitive set Pu 24 “Grotto Art of China”, four stamps:
• (1) 2 yuan: Great Buddha, Northern Wei, Yungang Grottoes (30 November 1988)
• (2) 5 yuan: guardian warrior, Tang, Longmen Grottoes (10 August 1988)
• (3) 10 yuan: bodhisattva, Western Wei, Maijishan Grottoes (15 October 1988)
• (4) 20 yuan: woman feeding chickens, Song, Dazu Rock Carvings (20 October 1988)