Kan-chiong is good. A headstart to a good working attitude. Just needs to learn social etiquette, that's all, as you say.

Lucky you never get one kind of poly intern that I got in my company... pass him some work to do, after that he can disappear for long lunch break. Ask him... he say he already finished the work, can go home or not? %$%%^&%#**!! Check his work quality, not even properly done!

Back to your issue, just take time to have a chat with this intern and find out his concerns lah. At the same time, communicate your views. Good to make more friends and contacts. He may be your link to a better job next time in another company.