"Modern Han": "[Condensation] (text) compact and concise: writing style ~. Also used as condensation." "Xinhua" only includes "condensation". "Big Dictionary" takes "condensation" as the main article.
Word frequency statistics: Condensation 63, Condensation 54.
"Ning" is the suffix for ice, and its original meaning is to freeze. "Yi Kun": "When walking on frost and solid ice, the yin begins to condense." It is extended to condense and concentrate. "Lian" originally means smelting. "Shuowen": "Lian, Shuo also cures metal." It generally refers to general tempering and exercise. The original meaning of "Lian" is to cook silk and linen fabrics to make them soft and white. "Shuowen": "Lian means practicing." Later it was extended to mean multiple operations and repeated practice, and then it was extended to mean sophistication and proficiency. Therefore, "condensation" and "condensation" are both reasonable grounds. In order to be consistent with "sophisticated, capable, concise, refined, sophisticated", etc., it is appropriate to use "concise" as the standard word form.