Complex sentence: There he mastered the Chinese language, set up the first school for teaching foreigners Chinese, and translated part of the "Great Learning" into Latin, the first translation of a Confucius classic in any European language.
Split into simpler sentences: There he mastered the Chinese language, and set up the first school for teaching foreigners Chinese. As a sinologist, he translated part of the "Great Learning" into Latin, the first translation of a Confucius classic in any European language.