Tā de xiǎngfǎ hěn dānchún, bù huì qù kǎolǜ nàxiē fùzá de lìyì guānxì.
His thinking is very simple; he never considers complicated matters of self-interest.
Tips
usage
单纯 can be positive (innocent, pure-hearted) or imply naivety depending on context. As an adverb it means 'merely/purely': 不单纯是... (it's not merely...).
