Group 1 - The core viewpoint of the article highlights that Chang's New Materials Technology (Shanghai) Co., Ltd. and Changtuo Nano Materials (Zhejiang) Co., Ltd. have obtained a patent for a method of producing nano metals, with the patent announcement number CN121131739B and an application date of November 2025 [1] Group 2 - Chang's New Materials Technology (Shanghai) Co., Ltd. was established in 2017, located in Shanghai, primarily engaged in the non-metallic mineral products industry, with a registered capital of 9.879 million RMB [1] - The company has made investments in 5 enterprises, participated in 7 bidding projects, and holds 13 trademark registrations and 61 patent records, along with 27 administrative licenses [1] Group 3 - Changtuo Nano Materials (Zhejiang) Co., Ltd. was founded in 2025, located in Taizhou, primarily focused on the manufacturing of chemical raw materials and products, with a registered capital of 55 million RMB [1] - The company has 1 patent record and holds 3 administrative licenses [1]