The Chinese (as evidenced both by the original pictures and this video) do take their cleanliness and safety very seriously in regards to consumables. I would believe that they are very careful about the levels of ingredients in their liquids, although it is possible that some settling occurs at some point in the process, affecting batch taste. This is less prevalent when each bottle of liquid is made one at a time or on a small scale like most US manufacturers do.
Honestly, the only real complaint I could have on Chinese juices is that they have relatively few flavor choices.