I can't speak for Robert, but I'm not sure he would be that interested to deal with a Chinese manufacturer at this point in time. FWIW, the Chinese, historically, have not offered the same quality and features in their pantyhose products that European companies have. The yarns just aren't the same as the amazing garments that Europeans, specifically Italians, have been long producing. The Spanish and Germans have some great hosiery products, too. Even the Polish brand, Gabriella, has some terrific stuff at an extremely competitive price point, in my personal experience.
I think the only true test would be to put that Limerence brand directly up against the Europeans, and see what comes out of wearing tests, and real life day-to-day experience, as opposed to hearsay and hype on the internet by influencers. I'm betting, though, that European brands like Oroblu, CdR, Omero, and even Robert's latest offerings here at Shapings, Girardi, (which I have not yet tried myself) would hold their own and probably even surpass the expectations of many who've not, to this point, indulged in some of the better Italian products Robert makes available here at pretty reasonable prices.
I think, too, that Robert has some current inventory that doesn't sell very regularly, or all that well, and he's likely focusing on tightening up that area of his business, at the moment, than expanding into a new line of Chinese origins. Robert has a long standing relationship with Italian producers that he has built up over the decades, and my guess is his loyalties remain there.