Humber is sure to be the boss. He has been recording and broadcasting from the beginning, and R&D should be the most. The second is Oviya, after all, the first batch of recording and broadcasting manufacturers. The third is China Youth, which has been relatively empty for two years. Basically, it is a PPT product. The products that can land are still the first batch of R&D products. The fourth is Qu Rui. Now we are cooperating with Jiafa Examination, and we are expanding to the examination business. The fifth should be excellent. However, in recent years, I have switched to the online platform, and the hardware is basically underdeveloped. I have made many knowledge tree platforms for universities. The sixth article is Xiang, a rising star, who has obtained the investment of Tencent Ma's father and has better publicity. In the past two years, I have been transforming into a big screen and a blackboard. However, it is sad to hear that Ma's father withdrew his capital last year. There are many other second-tier brands, such as Beyond, Perfect, Ladder, Xunwei, Haikang, Dahua, Xiwo, ITC and Xiaoyu. These main businesses are not recording and broadcasting, but basically OEM.