Shandong Wei Qing Food & Beverage Co., Ltd. and Ji Mei DJI (Shandong) Co., Ltd. According to Wang Laoji's information in Shandong, the processing plants are Shandong Wei Qing Food & Beverage Co., Ltd. and Ji Mei DJI (Shandong) Co., Ltd. ... Wang Laoji is the brand of Wang Laoji herbal tea, which was founded in Daoguang period of Qing Dynasty (1828). Wang Zebang, the founder, is recognized as the ancestor of herbal tea, which is made of herbs and is known as the "king of herbal tea". The product form has changed from water bowl herbal tea-herbal tea bag-herbal tea powder-herbal tea beverage and other carriers.