(Bloomberg) — DeepSeek said it’s restricting signups for new users to people with a mainland China telephone number, after a surge of global interest in the Chinese artificial intelligence chatbot led to service disruptions.Most Read from BloombergWhat Happened to Hanging Out on the Street?Vienna Embraces Heat Pumps to Ditch Russian GasBillionaire Developer Caruso Slams LA Leadership Over WildfiresHow Sanctuary Cities Are Preparing for Another Showdown With TrumpHoboken PATH Station Will Close