Is superconducting filter currently used in China?

Since the superconducting filter developed by Tsinghua University was first applied in the wireless communication industry, China has officially opened the practical application of HTS filter in the wireless communication industry. America has always been in the leading position in the world. At present, American Superconductor Company (NASDAQ: AMSC) is the only company in the world that has a complete set of superconducting filter technology (including more than 100 patents), and it is also the only company in the world that can mass-produce and provide high superconducting filter systems. Not only provide all kinds of superconducting products for American space communication, but also provide more than 5,000 sets of products for American communication. As an agent, Foshan Lucent Company introduced superconducting filters from American superconducting companies, and also obtained the purchase list of domestic operators' network construction. It can be said that the superconducting filter really began to be commercialized on a large scale, which played a key role in the construction of the national trinity network layout.