By Yingzhi Yang, Pei Li and Brenda Goh (Reuters) - TikTok owner ByteDance is working on a Clubhouse-like app for China, sources familiar with the matter said, as the global success of the U.S.-based audio chat service inspires a rush of copycats in the country. At least a dozen similar apps have been launched in the past month, with momentum picking up after Clubhouse was blocked in China in early February. Clubhouse had seen a surge in users who participated in discussions on sensitive topics such as Xinjiang detention camps and Hong Kong independence