皮相之谈

Explanation: Refers to look outside, does not seek in-depth understanding of the superficial insights 　　Source: Qing "classic often Tanshi" Zhong Rong said he was the source for "Xiao Ya," ", the talk seems to be skin deep." 　　Examples: Although this topic is high-sounding talk, but their arguments and arguments, but only ~. Thesaurus:  Surface Opinion