SINOPEC diesel hydroupgrading-isodewaxing technology (FHI), aiming at the production of diesel for the cold seasons and regions, is designed to process a variety of middle distillate feedstocks including atmospheric gas oil (AGO), LCO, coker gas oil (CGO) etc., and maximize distillate yield while producing ultra-low-sulfur diesel (ULSD) with improved centane number, reduced aromatics, low density and low solidification point through reactions including hydrodesulfurization, hydrodenitrogenation, saturation, selective ring opening, moderate hydrocracking and isomerization. FHI technology can be used to meet all current and possible future premium diesel upgrading requirements.