Dongnailun is a trademark registered by Wuhan Youjia Lihong Trading Co., Ltd. in China Trademark Office, which mainly provides accessories for daily use, such as toothbrushes and electric toothbrush replacement heads. In the electric toothbrush head market, Dongnailun is a well-known brand, and its products are widely used in all kinds of electric toothbrushes, and are divided into first-line brands.