This report analyzes the international business expansion of Casein Plc, a UK-based company, into the Shanghai, China market. It begins with an executive summary and introduction outlining the context of UHT milk demand in China and the company's objectives. The main body delves into the business expansion in Shanghai, utilizing the PESTLE model to assess political, economic, social, legal, and environmental factors impacting the business. The report also examines trade barriers and their impact on international business operations, providing insights into the challenges and opportunities Casein Plc faces. Furthermore, it addresses ethical and social issues, including corporate social responsibility, and concludes with a summary of findings and recommendations. The report aims to provide a comprehensive understanding of the complexities involved in international business expansion, offering valuable insights for businesses seeking to enter foreign markets.