Foreign and domestic processes are different. China has SCR5(WF) and SCR 10. There are similar ones in the world, such as SMR5 and STR 5, but the largest demand is No.20, SMR20, STR 20 and SIR20. In fact, their indicators are not as good as SCR 5 and SCR 10, but what changes have taken place in China, the biggest ones are Hainan and Yunnan. No.20 comes from other countries with stable quality and is an important raw material for manufacturing all-steel tires and semi-steel tires. And China's rubber, Biaoyi, has become the business variety of futures and some tire materials. Standard 2 is only used for low-end rubber products.

In short, China and international brands are comparable, both in terms of index control, but the quality is very different! Alas!