How does refinery hydrocracking and coking capacity change naphtha availability for HDS units?

How does refinery hydrocracking and coking capacity change naphtha availability for HDS units?
Heavy-oil upgrading is the hidden lever on naphtha supply. At Zhejiang Petrochemical, wax-oil hydrocracking yields roughly 64% naphtha, diesel hydrocracking 53%, and coking only 15%. With 7.6 million tonnes of wax-oil hydrocracking, 16 million tonnes of diesel hydrocracking, and 6 million tonnes of residue slurry hydrocracking, the site can add about 7.57 million tonnes of naphtha in phase one. That is why chemical-type private refiners reach a 56% chemicals yield, far above ordinary plants. More hydrocracking means more naphtha requiring hydrodesulfurization before cracking or reforming.