Good question, happy to answer. I'm a business consultant by trade, and for four months last year I was doing a major project for a client who was interested in becoming a major North American distributor for some different Chinese knife brands. The major knife/multitool brands that were examined were Sanrenmu/Land, Enlan/Bee, Ganzo, Tekut and Navy.
They are 5 separate companies with different ownership, unless something major has changed since December of last year. The site that's commonly referenced for Sanrenmu is not actually SanRenMu's official brand site - that's an advertising site run by a third party. That site exists to showcase the brands and as far as I know, they're paid a fee to provide new wholesale contacts to the companies they show products from (not an uncommon business model).