Yes, according to the trademark website query, Yangnai Shijia is a registered trademark and belongs to the 29th category of food in the international classification. The applicant for the trademark is Jiangsu Yangnai Shijia Brand Management Co., Ltd., and the registration authority of Jiangsu Yangnai Shijia Brand Management Co., Ltd. is the Nanjing Yuhuatai District Administrative Approval Bureau. It has been approved and recognized by the government department, so it is a regular brand.