translation of a series of books

I'm looking for a translator to the constant cooperation of the translation series of eight books of non-fiction (theme: Information & Communication Technology: Cloud Computing) into Chinese. Books are popular science.

As of today, is the first complete book of the series. The plan has seven. The entire life cycle is spread over 2-3 years. My proposal is based on the cooperation success fee, or 20% of the profits generated from the sale of a translation of one publication, within five years from the date of issue. With this, it sets an upper limit on compensation for 10,000 PLN. The series will be heavily promoted. In addition to the printed version of the plan on the digital version.