Are you sending them a disk along with a hardcopy proof? Also, are you sending them PDF press quality files? Since you are pretty much flying in the dark, there's only so much you can do. Language barriers don't help either. They should be able to tell you what RIP they are using and what press' they use, too. I sense that they may not communicate so they can dictate job parameters. That blows. All the more reason to do your printing state side.
Every time I send a pdf they ask for the ai with no discernible reason. I usually don't have time to send hard proof and disc, but I think we may end up going this route. Seems to be the only option. Boss is not going to like it with a due date of yesterday for everything LOL. Thank you for your time! Have a great day!!
FYI, I'm still looking for information and advice regarding color management between US and the People's Republic of China. Preferably from someone who works with PRC and this hurdle.
"Print state side" is not an answer nor an option as I mentioned prior. Thanks in advance for any information, books, sites, etc. Have a wonderful day and thank you for your time!