Definitely not. Manhwa comes from Korea. It has unique features that set it apart from Chinese comic works in terms of art style, storylines, and cultural influences.
An M Chinese manhwa might refer to a Chinese comic or graphic novel with a specific genre or rating labeled as 'M'. But it's not a very common or specific term.
To say'manhwa' in Chinese, you could say '闊╁浗缃戠粶婕敾 (H谩ngu贸 w菐nglu貌 m脿nhu脿)', meaning 'Korean webtoons'. But '闊╁浗婕敾 (H谩ngu贸 m脿nhu脿)' is a more common and straightforward translation.
I think 'Solo Leveling' has a great story. The concept of a weak hunter becoming the strongest is very appealing. The story is full of action - packed battles and the protagonist's growth journey is really inspiring. There are also various mysteries and political elements in the manhwa's world that add depth to the overall story.