Lansen Pharmaceutical Holdings Limited is a Hong Kong-based investment holding company principally engaged in pharmaceutical businesses. The Company operates through three segments. Specialty Pharmaceuticals segment is engaged in the development, production and sales of specialty pharmaceuticals mainly used in the fields of rheumatology and dermatology. Its main specialty pharmaceutical products include pafulin, leflunomide tablets and mycophenolate mofetil dispersible tablets. Plant Extract and Healthcare Products segment is engaged in the development, production and sales of Chinese medicine extracts and healthcare products. Other Pharmaceuticals segment is engaged in businesses related to other pharmaceuticals.