from what I've heard trusted , quality and Chinese are not often used at the same time, if your in the US I would stick with a US supplier if in Europe one of the other members might be a help.
What country do you need the Chinese supplier to import to? I've known China to supply quality products...the key is being able to communicate well (sometimes there is a language and ethics barrier).
most of the dealings I have had with Chinese stuff has not been good as you could tell from my post. on the other hand depending on the country you are in the cost of 100 vials will most likely meet with custom problems either a high fee or outright confiscation.