Same. Rebar main force refers to the main contract trend of rebar futures. As the contract will expire, the master contract will change, and the trend chart will connect the graphs of the master contract. This is also the meaning of reinforcement continuity. There is no difference between the two, but the names are different. Rebar is a common name for hot-rolled ribbed steel bars. The grade of common hot rolled steel bar consists of HRB and the lowest yield point of this grade.