First of all, I am from Shanghai Lange Steel Network, and our quotations are generally from large local companies. We call QQ every day, and then make a comprehensive analysis and quote a moderate price for this specification.
As for our steel and Lange, the north recognizes Lange and the south recognizes our steel.
The site price of construction steel in Tianjin and the settlement price of site purchase contract in the north are generally based on our experience. I have encountered this situation more than a dozen times, and the price is relatively correct.