At 17 h 20 of July 12, when the 1^st roll of pickling free was successfully recoiled in HSM, it symbolized official operation in China the first strip surface pickling free line in TISCO. With innovation to the traditional surface quality pickling process to the coil, the new line will improve greatly to the lower stream efficiency, energy saving & environment protection standard and added value of product, thus setting up a domestically new benchmark to the surface quality treatment with the brand new technique.