Cellyan Biotechnology Co., Ltd is an investment holding company engaged in the over-the-counter (OTC) pharmaceutical business in Hong Kong and Mainland China. It provides OTC pharmaceutical cross-border procurement and distribution, e-commerce supply chain services, customs clearance, drug listing, warehousing, and other logistics services. It also offers value-added services such as labeling, extended storage, product inspection, batch processing, and logistics support, as well as sales of health supplements and non-pharmaceutical products. The company serves e-commerce platform logistics partners, merchants, Chinese e-commerce platforms, and pharmaceutical distributors. It was formerly known as Hong Kong Pharma Digital Technology Holdings Limited and changed its name to Cellyan Biotechnology Co., Ltd in December 2025. Incorporated in 2023, it is based in Yau Tong, Hong Kong.