Eastern China (Shanghai):
4,200-4,220 yuan ($639-642) per tonne, up 50-60 yuan per tonne
Northern China (Tangshan) - weekly assessment:
4,000-4,030 yuan per tonne, up 10-20 yuan per tonne
Several Shanghai-based traders said sellers there were offering material at higher prices after futures kept climbing on Friday.
A Tianjin-based trader said there was a good chance of further price gains in the futures market, because futures prices are still relatively low compared with those...