The Hoa Sen Group's employee checking products in a warehouse. The company's profit after tax rose over 200 per cent year-on-year in Q1. (Photo: hoasengroup.vn) Hanoi (VNS/VNA) - The surge in prices of steel since the beginning of 2021 helped many steel producers record good performance in the first quarter. Rebar futures contracts, trading on the Shanghai Futures Exchange, increased sharply due to supply chain disruptions caused by the COVID-19 pandemic. The most traded May rebar contract climbed 17.4 percent this year and traded at 5,101 yuan per tonne. The rebar price rose 51 percent compared to April 2020. In its first quarter finance result,