Renzi qu shi jiu hao is an inventory number corresponding to no. 79.
Compare the flawless white jade plaque of the same form and design, inscribed with the same reign mark, and similarly numbered, in the Palace Museum, Beijing, from the Qing Court Collection, illustrated in The Complete Collection of Treasures of the Palace Museum: Jadeware, vol. III, Hong Kong, 1995, pl. 127.
Compare, also, the jade plaque with imperial mark and series number from the Oscar Raphael Collection, now in the Fitzwilliam Collection, Cambridge, England, and illustrated by James C.S. Lin, "The Collection of Qing Dynasty Jades in the Fitzwilliam Collection", Arts of Asia Magazine, May-June 2010, pp. 111-124, no. 14. Another similar plaque was included in the S. Marchant & Son exhibition, Post-Archaic Chinese Jades, June 1995, no. 51. See, also, the very similar plaque sold Sotheby's, Hong Kong, 27 April 2003, lot 3.