Group 1 - The core point of the article is that China National Materials International Engineering Company (Beijing) has obtained a patent for a system designed for the co-disposal of hazardous waste liquid in cement kilns, with the patent granted under announcement number CN115183239B and the application date being June 2022 [1] Group 2 - China National Materials International Engineering Company (Beijing) was established in 2010 and is located in Beijing, primarily engaged in public facility management [1] - The company has a registered capital of 350 million RMB [1] - According to data analysis from Tianyancha, the company has invested in 8 enterprises, participated in 82 bidding projects, and holds 120 patent records, in addition to having 11 administrative licenses [1]