Which Chinese coffee chain has added the most stores in the last 12 months?

 As of my last knowledge update in January 2022, I don't have the specific information on which Chinese coffee chain has added the most stores in the last 12 months. To get the most accurate and up-to-date information, I recommend checking recent business news, industry reports, or the official statements and reports from major Chinese coffee chains. Companies like Luckin Coffee, Starbucks, and other local chains are key players in the Chinese coffee market, and their expansion strategies can change over time.