Study Beijing and practice capital
Yanjingliandu, a Chinese idiom, Pinyin is y á NJ à ngli à nd à u, which means careful and slow thinking. It's from Wen Xin Diao Long Shen Si by Liang and Liu Xie of the Southern Dynasty.
Idiom usage
Used as an object or attribute; used in writing
The origin of Idioms
In the Southern Dynasty, Liang and Liu Xie's "Wen Xin Diao Long · Shen Si" said, "Zhang Heng studied Beijing for ten years, and Zuo Si practiced it with one discipline. Although there are great writings, he also thinks slowly." It took Zhang Heng ten years to compose Er Jing Fu and Zuo Si twelve years to compose San Du Fu.
Idiom explanation
Careful and slow in thinking.
Study Beijing and practice capital
not swayed by personal considerations - bù xún sī qíng
betray friends for personal gain - mài yǒu qiú róng