Based on Jin Yong's canon chronology, is it plausible that an aged Hui Juk could have met and instructed a teenaged Hung 7 (the future North Beggar Hung 7 Gung) in Dog Beating Stick Technique and Hong Lung 18 Palms? Or were the eras of DGSD and LOCH too far-removed from each other that even a very old Hui Juk could not have plausibly encountered even a very young Hung 7?