Are you accustom to living in China? (or acculturate) here living is a noun. Why don't you try to speak in english then You can get more native speakman to answer your question.

Are those who lived in China still used to it? 在中国 in china 住的 those who lived 还 still 习惯吗？ used to it

“在中国住的还习惯吗？”= "to live in China, but also habits?"