Good enough for me! We all know the Chinese manufacturers are very forthcoming with accurate answers regarding the safety of the products they sell. It's not like they would sell tainted milk and infant formula to their own people, or send toys painted with lead-based paint all over the world, or poisoned pet food and toothpaste. Oh wait -- they did all those things.
Sorry, but I take safety claims from Chinese manufacturers with a grain of salt. They also claim cheap chrome-plated tanks and drip tips are "polished aluminum" or "stainless steel" when they are clearly neither. When questioned, they claim they can't be certain they are either or neither.
I'm all for getting good mods into the hands of people who want and need to get off analogs, but I'm always wary of the claims of manufacturers based in China, especially regarding safety.