Hi there:
I am a registered patent attorney, and have done quite few patent applications from Chinese to English and English to Chinese. Most recent one is translatign and filing US patent 7,509,036 in China.
My rate is USD250(EN to CN) per 1000 English words, nad USD300(CN to EN) pre 1000 Chinese characters.
For long term contract, my rate is USD200 (EN to CN) per 1000 English words, and USD250 (CN to EN) per 1000 Chinese characters.
Should you be interested working with me, please reply to this message and I will forward my resume and references.
Best Regards,
~ Patentdrafter