Happy November!
Have you been losing weight? (Just wanted to be consistent).
Regarding YBY, I don't think its anti-cancer effects are very strong. Nevertheless, the Pubmed database cites about 30 bench research articles (for Panax notoginseng, its chief constituent) identifying multiple anti-cancer effects against various tumor types. So there is an effect there, and piggy-backed on top of other anti-cancer herbs, it may help out in reducing recurrence.
Steve