5idea Chinese is a leading workplace Chinese learning brand helping professionals learn Mandarin fast in their spare time. It holds 30+ intellectual property rights, publishes the world's first set of "General Chinese in International Workplaces" textbooks (the "6+N" system), runs the AI-powered CHIease learning app in 8+ language versions, and delivers a complete "4+2+1" product and service system backed by the pioneering "1+3+N" teaching model.