Wai Siu Bo, not being much of a martial artist, was dependent on his weapons and equipment to get by (sort of like Batman and his utility belt). Some of his most frequently used items, however, seem to be reminiscent of (if not directly passed down from) the CONDOR HEROES TRILOGY era.
1. The flesh-dissolving acid that he got from Eunuch Hoi was invented by West Poison Au Yeung Fung.
2. The armored vest he got from Obai's stash of stuff was reminiscent of Wong Yung's old armored vest, though it lacked the sharp spines that provided an offensive capability.
3. The sharp dagger from Obai's stash seemed to have similar properties to the Heaven Sword and the Dragon Sabre.