Subject + 小心翼翼 + 地 + Verb
小心翼翼 (xiǎoxīnyìyì) is a four-character idiom meaning "very cautious" or "with great care." It is more emphatic than 小心 alone and conveys extreme carefulness. It is typically used with 地 as an adverbial modifier, as in 小心翼翼地走 meaning "to walk very cautiously."
他小心翼翼地端着那杯热咖啡。
Tā xiǎoxīnyìyì de duānzhe nà bēi rè kāfēi.
He carefully carried that cup of hot coffee.
她小心翼翼地打开了那个旧箱子。
Tā xiǎoxīnyìyì de dǎkāi le nàge jiù xiāngzi.
She carefully opened that old box.
孩子小心翼翼地走过结冰的路面。
Háizi xiǎoxīnyìyì de zǒuguò jiébīng de lùmiàn.
The child carefully walked across the icy road.