trust before they do business so it's vital you build a strong relationship, and show your respect at all levels.
Whether you have a Chinese translator, Chinese agent/staff is irrelevant. It's you who has to build this relationship and show your respect and Face.
To the Chinese it's important to 'Give Face', 'Save Face' and 'Show Face', but never 'Lose Face'.
Getting closer to the inner circle will help your business, and give you a higher priority. Once this has been established you can ask for better prices and better shipment dates.
Learn the Chinese business culture and make life easiers for you doing business in China.