Why is 的 needed in 二来是更深度的了解中国文化?

Question

In the following sentence:

这次来中国，一来是提高中文水平，二来是更深度的了解中国文化。

The meaning should be something like the follows:

The reason I came to China this time is, for one reason in order to raise my Chinese proficiency, and for another to understand the Chinese culture more deeply.

I also understand that 地 can be used to make the adjective work as an adverb. But this is 的, not 地.

If I break down the components:

• 更深度的 - adverb?
• 了解 - verb
• 中国文化 - object

I also understand 的 can make the adjective to a noun phrase, but in that case, it becomes a form of O-V-O, which doesn't make sense.

So why is 的 needed in the sentence above and how does it work there?

Answer 1

I would say in modern Chinese, 的 is often used to replace 地 in this kind of sentences.

Both 深度的了解中国文化 and 深度地了解中国文化 are acceptable.

I personally prefer 深度的了解中国文化.

You could refer to the definition 5 for 的 in this dictionary.

This example demonstrates my point to your previous question 26301.

This is the screenshot from the dictionary of my handset, which defines it clearly.

Answer 2

The author used "的" incorrectly.

Obviously should use"地".