BEIJING — A former OpenAI researcher is now chief AI scientist for Tencent in China, and wants to build artificial general intelligence. It's a sign of a shift in the U.S.-China tech race. AI with human-level or above capabilities (AGI) has long been the goal of U.S. companies such as OpenAI, Anthropic and Alphabet, which acquired British startup DeepMind . Chinese companies rushing to catch up on AI and facing U.S. chip controls have instead focused on ways to use the technology in