OpenAI last month announced plans to crack down on China-based artificial intelligence developers covertly accessing the startup’s technology, which it doesn’t offer in China. But OpenAI’s conversational AI models are available to Chinese businesses—if they sign up for Microsoft’s Azure cloud service, which operates in China through a local joint venture.Microsoft makes clear in its public statements that Azure China, operated as a joint venture with local company 21Vianet, offers Azure’s OpenAI...