These are quite famous, but the wages in Shanghai are good, but the consumption is too high. I suggest not to go! I just learned steel structure. Personally, I think there are also good steel structure companies here in Xuzhou.
The prospect of steel structure specialty is very good. It is very popular abroad now, and China has only been developing for about 30 years. After the Sichuan earthquake, the country discovered the importance of steel structure, so the prospect is very good!