Another reference from Fourmont..
"22-22.五十言餘
Ou che yen yu. (Wushi yan yu)
Cinquante Paroles. [Du Ciel.]
Fourmont CCXXXIX. N. F. Chinois 3043 et 3044.— Courant, 3406.
Ricci et Aleni ont composé chacun vingt-cinq
paroles = 50 de ce livre. 25 est une allusion à
l'Y-king où le nombre 5 multiplié 5 fois fait
celui de 25 qui est le nombre du Ciel.
Gravé à la mission du Fou-Kien (1645).
Introduction de Tchang Keng.
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22-22. 五十 言 余
Ou che yen yu. (Wushi yan yu)
Fifty Words. [From Heaven.]
Fourmont CCXXXIX. N. F. Chinese 3043 and 3044 .- (Maurice) Courant, 3406.
(Matteo) Ricci and (Giulio) Aleni have each made twenty-five sayings
= 50 words of this book. 25 is an allusion to
the I-Ching, where the number 5 times 5 multiplies to that of 25 which is the number of Heaven.
Engraved with the mission of Fukien (1645).
-Introduction of Tchang Keng."
from Henri Cordier's book
http://gallica.bnf.fr/ark:/12148/bpt6k54264156.r=fourmont ci...
The translation workplace 
peer agreement (net): +1
