For example, let examine this paper: http://www.sino-platonic.org/complete/spp211_confucius_laozi.pdf
which clarified the differences between Taoism and Confucianism.
It requires the readers to know about the Huangdi-Shennong era, Yao-Shun-Yu era, Shang-Zhou era, Qin-Han era, basic knowledge on classical books of ancient China, etc. All of these knowledge, while common to Chinese scholars, is not easily accessible to Western scholars. Therefore, it's impossible to understand eastern philosophies separated from their social context, especially many of them were social philosophies.