Aromatherapy shower heads are a development offering, not a stock item. The new capability page states that plainly and then explains the route: the cartridge chamber, the O-ring layout, the assembly sequence, and the water test are already proven in filter production, so a fragrance project concentrates on media selection, sealing behavior with a new medium, and retail presentation.
The page also sets the limits. ZHONGHE holds no fragrance certification of its own, buyers plan their own market registration or listing checks where those apply, and open questions are marked on the page rather than answered with a guess. Buyers who want to start a project send the target market, the fragrance format, the expected quantity, and the packaging plan.
The companion buyer guide covers the same ground in more depth, including cartridge formats, compatibility testing, and how a scented cartridge is handled during production testing.