What are the third-party inquiry institutions for building materials?

Guizhou Dinghui Material Service Co., Ltd. and Sichuan Huang Rui Consulting Service Co., Ltd. ... There are many third-party material inquiry institutions in China to choose from, such as Guizhou Dinghui Material Service Co., Ltd., Sichuan Huang Rui Inquiry Service Co., Ltd., Jingsi Road Inquiry Technology Service Co., Ltd., Shandong Xun You Inquiry Service Co., Ltd., etc. These institutions all consider their industry authority, reputation, service quality, commitment and credibility, as well as their ability to regularly check and verify products to ensure better service quality and inquiry effect. Third-party inquiry means that Party A entrusts Party B to make its own inquiry, and Party B is the third party. It is a transaction with Party A to fill in the name of inquiry unit, contact person of inquiry unit, material specification and material price in the category of tripartite inquiry form. ..