Astrazeneca plc is investing $15 billion in China through 2030 to expand R&D and manufacturing, marking one of the largest long-term investments by a multinational pharma company in the country. The U.K.-based company also struck a deal worth up to $3.5 billion with China’s CSPC Pharmaceuticals Group Ltd. to accelerate the development of next-generation therapies for obesity and type 2 diabetes.