Group 1 - The sonar industry in China has over 690 active companies, with Guangdong province having the highest number at approximately 110 companies, followed by Jiangsu, Shandong, and Zhejiang [1] - Jiangsu province leads in effective patent applications in the sonar industry, with a total of 1,186 applications, indicating its strategic positioning and technological innovation in this field [3] - China Shipbuilding Industry Corporation holds the highest number of effective patent applications among companies, totaling 25, followed by Zhongke Tanhai (Shenzhen) Marine Technology Co., Ltd. with 21 applications [5] Group 2 - Zhejiang province has the highest number of sonar bidding projects, totaling 657, followed by Guangdong, Jiangsu, and Anhui with 492, 420, and 334 projects respectively [7] - Jiangsu province also has the most winning bids in the sonar sector, with 385 projects, followed by Shandong, Zhejiang, and Guangdong with 358, 283, and 195 projects respectively [9]

Group 1 - The Guangdong Province has upgraded and maintained its operational buoys in the Pearl River Estuary to the western coastal areas, which provided high-precision data during Typhoon "Butterfly" [2] - The upgraded buoys, equipped with Beidou positioning technology, were successfully deployed from Zhuhai to Zhanjiang, with all buoys operating well and meeting data quality standards [2] - The maintenance of a 6-meter comprehensive observation buoy included calibration of key sensors, enhancement of solar power systems, and anti-biofouling treatments [2] Group 2 - The buoys, particularly those in the Zhanjiang area, captured critical data on typhoon pressure, wind strength, and wave changes, which were transmitted to the Guangdong Marine Forecast Center [3] - The timely and accurate data supported the forecasting agency in creating warning information and helped government emergency departments in formulating evacuation and storm avoidance plans [3] - The Guangdong Provincial Department of Natural Resources plans to strengthen the management and regulation of the marine operational observation buoy system to enhance marine safety and promote high-quality marine economic development [3]