Discussion of 冰冻三尺非一日之寒/冰凍三尺非一日之寒 [bīng dòng sān chǐ fēi yí rì zhī hán] it takes more than one cold day for the river to freeze three chi deep - it takes time for things to develop into a certain state, Rome was not built in one day - Trainchinese

1 - 冰冻三尺 bīng dòng sān chǐ

1 - 冰冻三尺（bīng dòng sān chǐ），意指事物发展需循序渐进，逐步积累，方可达到深入透彻的境地。