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.
You can try searching on some popular online comic platforms. Some websites specifically focus on Chinese-language comics and might have what you're looking for.
Not all Chinese manhwa are the same. It could be that the ones you've come across happen to share some similarities, but there are many unique and different ones out there waiting to be discovered. Different artists and writers bring their own creativity and perspectives to the table.
Chinese manhwa authors commonly utilize sites like Doujin Manhua or KuaiKan Manhua. These platforms provide a space for them to reach a wide range of readers and gain exposure for their creations.