There are not many companies doing well in China, such as Zhejiang University, Hollysys, Keyuan, Xinhua, Tong and so on. , as well as domestic engineering branches of multinational companies ABB, Siemens, Emerson and Honeywell, but these are all concentrated in Beijing-Tianjin region and the Yangtze River Delta region, and their engineering technology branches are also distributed in cities with convenient geographical locations in Wuhan, Chengdu, Hangzhou, Nanjing, Jinan, Xi 'an and Shenyang. I hope I can give you some information about swimming.