Production date. According to the official website of Yanjing Beer, the date on the bottom of the Yanjing Beer bottle is the production date. After more than 30 years of development, Yanjing Beer has become one of the largest beer groups in China. In 2013, the beer production and sales volume was 5.71 million liters, with sales revenue of 18.807 billion yuan, intangible assets of 66.076 billion yuan, and 46,000 employees. It has 41 beer manufacturers, 2 raw material bases, and 8 related and affiliated enterprises.