Engraved lower left Ying-feng, dated November 1952 in Chinese, dated 1952 and numbered 23/30

ILLUSTRATED:
Youth (Volume 11, No. 3), Taipei, March 1960, illustrated (different edition)
The Young Companion (No. 45), Taipei, June 1960, illustrated, p. 22 (different edition)
Yuyu Yang Corpus Volum I, Artist Publishing Co., Taipei, 2005, illustrated, pp. 24-25 (different edition)

This sculpture is to be sold with a certificate of authenticity issued by Yuyu Yang Foundation, Taipei