An integration process of vacuum residue FCC(VRFCC)and moderate pressure hydro-cracking(RMC),developed by RIPP and BDI,opens a new route for maximizing production of both high-value products and the feed for steam cracking(SC).VRFCC technology has been put on stream at Yanshan Petrochemical Co.(YPC)since November 1998.A 79.2%(mass percent)high-value product(LPG+GSL+LCO)was surprisingly made on the test run from a resid-feedstock of 85.0%(mass percent)Daqing crude VR content.No facility coking was found during the operation.RMC is a renovating moderate-pressure hydrocracking technology,the end point of the heavy VGO feed is as high as 534 ℃,and the RMC catalyst performance shows high hydrodenitrogenation activity and high ring-opening selectivity.The process highlights the flexibility of product slates--maximum premium mid-distillates yield(38.0%(mass percent))and/or maximum hydro-unconverted bottoms(Hydro-BTMs)yield(50%～70%(mass percent)).Over 30%(mass percent)ethylene was produced from SC process based on Hydro-BTMs feed.The application of VRFCC/RMC integration at YPC not only covers the shortages of SC feed for 660 kt/a ethylene production capacity,but also increases the total yield of premium fuel products.