Group 1 - Hainan Kexun Zhian Technology Co., Ltd. applied for a patent related to "water sound target recognition method, device, related equipment, and computer program product" with publication number CN120214768A, filed on March 2025 [1] - The patent involves a method that processes time-frequency features of water sound signals using multiple residual networks, enhancing recognition accuracy by integrating shallow and deep features [1] - The shallow residual network captures local features while the deep residual network captures global features, resulting in a comprehensive representation of water sound signals [1] Group 2 - Hainan Kexun Zhian Technology Co., Ltd. was established in 2024 in Sanya, with a registered capital of 10 million RMB and holds 1 patent [2] - Hainan Shenggu Technology Co., Ltd., founded in 2018 in Sanya, has a registered capital of 30 million RMB, participated in 28 bidding projects, and holds 2 patents [2] - iFLYTEK Co., Ltd., established in 1999 in Hefei, has a registered capital of approximately 2.31 billion RMB, invested in 129 companies, participated in 5000 bidding projects, and holds 5000 patents [2] - Hefei iFLYTEK Digital Technology Co., Ltd., founded in 2006 in Hefei, has a registered capital of approximately 87.93 million RMB, invested in 8 companies, participated in 266 bidding projects, and holds 230 patents [3]