Group 1 - The National Intellectual Property Administration of China has granted a patent for a method of preparing high-temperature zirconium silicate nanofibers to multiple companies, including Shanghai Nanstar High-Tech Co., Ltd. and others [1][2] - Shanghai Nanstar High-Tech Co., Ltd. was established in 2023 with a registered capital of 5 million RMB and focuses on software and information technology services [1] - Tianjin Nanstar Insulation Materials Co., Ltd., founded in 2006, has a registered capital of 25 million RMB and specializes in non-metallic mineral products, holding 46 patents and participating in 58 bidding projects [1][2] Group 2 - Shanxi Nanstar New Materials Technology Co., Ltd. was established in 2022 with a registered capital of 10 million RMB, focusing on non-metallic mineral products and holding 5 patents [2] - Anhui Nanstar New Materials Technology Co., Ltd., founded in 2023, has a registered capital of 5 million RMB and is engaged in technology promotion and application services, with 5 patents and participation in 5 bidding projects [2]