The crave for "yeast" emerged first in the North China Daily News (1934), later in the Shenbao (1941). Advertisers, brandnames and forms of products differed in both newspapers.

Sources/references:

• Charles N. Frey, "History and Development of the Modern Yeast Industry". Received October 11 1930. Industrial and Engineering Chemistry. November 1930. Vol. 22, No.11. p.1554-1162.
• Wikipedia, "Yeast", "Fleischmann's Yeast".
• Fleischmann's Breadworld website, "History of Yeast". Last accessed June 30, 2017.
• Dakota Yeast website, "History". Last accessed June 30, 2017.