The corrugated beam guardrail board and expressway guardrail produced there are the best ~! ~ Do you have any details?

It seems that the biggest manufacturer in China comes from Sichuan, and its name is Sichuan Qi Yue Corrugated Beam Guardrail. It seems that the materials are imported from Taigang and Pangang, and the quality is ok. I just heard what they said about Q235 and Q 195, and I don't know what's going on. Can find their company in Alibaba, ask more questions, only know that they are quite big. I heard from my friends that they have become the designated manufacturers of urban-rural integration road safety barriers. I also purchase them myself, but the quantity is small and I only purchase them.