jiu qu
From The Oxford Companion to Spirits & Cocktails
refers to the type of qu, a solid-state fermentation starter, used in the production of alcoholic beverages such as baijiu in China. See qu; baijiu;, China.
This definition is from The Oxford Companion to Spirits & Cocktails, edited by David Wondrich (Editor-in-Chief) and Noah Rothbaum (Associate Editor).