深入 + 地 + Verb
深入 (shēnrù) as an adjective means "in-depth," "thorough," or "profound." When modifying a verb, it takes the form 深入地 + Verb, as in 深入地了解 (to understand in depth). This usage differs from the verb 深入 meaning "to go deep into."
我们需要深入地分析这个问题。
wǒmen xūyào shēnrù de fēnxī zhège wèntí.
We need to analyze this problem in depth.
记者对这件事做了深入的报道。
jìzhě duì zhè jiàn shì zuò le shēnrù de bàodào.
The reporter did an in-depth report on this matter.
经过深入地了解,我才明白他的想法。
jīngguò shēnrù de liǎojiě, wǒ cái míngbái tā de xiǎngfǎ.
Only after gaining a deep understanding did I comprehend his thoughts.